Rear Air Suspension Kit

[ctrlraven]

Last time I was under my car I noticed some cracking and tears in my rear air bags, still holds air but usually my compressor kicks on every time I drive. To avoid being SOL and forced to do something I am going to be pro-active and replace everything. Is there a recommended kit to get?

[MyO4Rawdur]

Last time I was under my car I noticed some cracking and tears in my rear air bags, still holds air but usually my compressor kicks on every time I drive. To avoid being SOL and forced to do something I am going to be pro-active and replace everything. Is there a recommended kit to get?

there is one that has a little knob on it so you can adjust it whenever you want but i dont know where to find it. i used to talk to an instructor from a school i went to that told me about it. im going there for a car show soon so if i see him ill find out and let you know.

i also talked to my uncle who said to try going on google and looking up "aftermarket air suspension kit" but i assume you may have already done that.

[whitey]

Arnott industries makes replacement air suspension stuff. I'm not sure if your looking for direct replacement or a custom air suspension kit

[DOOM]

Let me know what you get BIRDMAN! :D

[ctrlraven]

Arnott industries makes replacement air suspension stuff. I'm not sure if your looking for direct replacement or a custom air suspension kit
Thanks, I know there was them and I think Suncore or something like that.

Even though this says 1992-2011 GM, would this have the correct rate for our car?
https://www.arnottindustries.com/part_MERCURY_yid3_pid20_gid463 .html

[RF Overlord]

The Marauder air bags are actually from a TC Limo, so I would ask the rep at either Arnott or Suncore to verify that their springs are the correct rate (102 lbs/in).

Oh yeah, they're also the same as an HPP-equipped CV or GM.

[ctrlraven]

The Marauder air bags are actually from a TC Limo, so I would ask the rep at either Arnott or Suncore to verify that their springs are the correct rate (102 lbs/in).

Oh yeah, they're also the same as an HPP-equipped CV or GM.
Good info, thanks!

[screamn]

The Marauder air bags are actually from a TC Limo, so I would ask the rep at either Arnott or Suncore to verify that their springs are the correct rate (102 lbs/in).

Oh yeah, they're also the same as an HPP-equipped CV or GM.

+2 ^^^^^^

Very good info!!!!! :up:

Never knew this and should be stickied in the suspension forum for future reference.

[burt ragio]

What are the front oem springs rated at ?

[MyO4Rawdur]

What are the front oem springs rated at ?

+ 1 ^^ what are good replacements as well. aftermarket/performance mod.

[babbage]

Last time I was under my car I noticed some cracking and tears in my rear air bags, still holds air but usually my compressor kicks on every time I drive. To avoid being SOL and forced to do something I am going to be pro-active and replace everything. Is there a recommended kit to get?

I spray mine with amsoil hd metal protect. You could also use armor-all, WD40, to keep them from cracking, drying out etc and protected. Keep compressor dry and rust free with same above too. Put a thick coating on the new bags to protect.. Arnott is a good aftermarket system from what I've heard.

[IwantmyMMnow!]

So, ctrlraven, you're saying that your bags are old and have cracks/tears in them?:lol:

...I should probably check mine the next time I'm up on a lift....

[EMAS]

You do want the Arnott "limo" bags, the plus is they have billet aluminum bases instead of plastic but they are the correct HPP/Marauder/Limo/Livery spring rate. IIRC that's 130lbs instead of the 120lb standard units.

[RubberCtyRauder]

Arnott Limo air bag link
https://www.arnottindustries.com/part_LINCOLN_Air_Suspension_Pa rts_yid2_pid68_gid263.html

[guspech750]

Good stuff.


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[whitey]

I wouldn't use wd40, from my understanding it has petroleum distillates and will eventually eat away at rubber. I use silicone on any rubber parts

[RoyLPita]

These companies also offer air suspension components:

http://www.strutmasters.com/

http://www.protierind.com/

[RubberCtyRauder]

also here is Suncore Industries Marauder air suspension info and the town car limo suspension

marauder http://www.suncoreindustries.com/MERCURY-MARAUDER-suspension.php

limo http://www.suncoreindustries.com/LINCOLN-TOWN-CAR-LIMOUSINE-suspension.php

not sure if they are the same or if their tech reps can tell you more about the air spring rates

[DOOM]

This should be a sticky!

[gdmjoe]

For your reference .....

Rear Air Suspension - FAQ (http://www.crownvic.net/drock96marquis/RAS.htm) ««« -click-
.

[lifespeed]

Has anybody used the Arnott Towncar/limo air springs? I am concerned about getting the stiffer Marauder/HPP rate. I think the diameters of the upper and lower caps are the key dimensions determining the spring rates. anybody compare these diameters to the Marauder pieces?

I called them trying to get the information, and they are absolutely clueless, telling me drivel like the bags are the same for the GM and the towncar, the towncar is heavier, the engineers won't give out the spring rate because it is Top Secret (!).

Morons. But the price is less than half that of Ford. Ordinarily I give Ford the benefit of the doubt and buy their parts, even at a premium. Not clear to me that this is a part that I should source from Ford, however.

[EMAS]

It's the shape of the bottom "cone" that determines the spring rate. Arnott used to note that the limo bags were the higher rate. I can't speak to the Panther bags but the Mark and Continental bags/struts I've bought from them over the years have been high quality.

[Krytin]

From gdmjoe's link above:



Rates:

The air-springs rate is determined by the piston design. Each panther air spring is color coded, using the upper cap and the plastic piston.
THe rates and color codes go as follows:

-1997 Base RASCream piston and cream cap75 lbs/inchall years HPP air-springsblack piston and cream cap102 lbs/inch1998+ Base RAScream piston and black cap89 lbs/inch
For comparison, the steel rear coil rates are: 130 lbs/in civilian, 160 lbs/in CVPI. However with RAS, being air springs, it's rate is variable and dependent on how much air is pumped in. If you add 200 lbs in the trunk, your effective spring rate will be higher as the RAS will pump more air into the air springs to keep the rear at trim height. Likewise, if you lower the rear suspension via the height sensor your spring rate will be lower than before - as there is less air in the bladder. The ratings of the factory airsprings are supposed to be with the springs inflated to normal operating pressure to keep the vehicle at trim height at factory curb weight.

Because of which, it's hard to directly compare the stiffness of the RAS airsprings rate to the base or CVPI coils by the number alone
You can easily see yours by going under the rear of the car (no need to raise it) on the bottom of the Air-Spring is the plastic support that rests on the perch (the piston). Cream/white indicates it is the low-rate spring, as used in non-HPP RAS equipped panthers (Town Cars included)
The black piston-ed air-springs are for HPPs, also used on Marauders and Town Car touring sedans and 99+ Limos/Livery.
Cream piston for base RAS equipped non-HPP (or similar) models, towing package included. LX Sports also use base rate air springs, the reason behind this is the 17" wheels. Ford had to soften suspension to offset the lower profile tires.
Marauders have the 18" wheels, and no-compromises on the HPP equipment. MMs also ride like trucks by comparison to base panthers IMO lol
Sport owners will also find they do not have the 21mm HPP/MM sway bar, rather the smaller 17mm.

Ford advertises the LX Sport as having the HPP, but in fact an LX Sport's rear suspension is the same as a normal 98+ Town Car.

Later model HPPs will have the base-rate RAS air springs instead of the *true* black piston HPP springs. This change was believed to be made ~2001, however there have been a few reports of HPPs still with the stiffer black piston springs



Component swapping and replacement:

The air springs will swap between all applications, the ride height computer/height sensor and drier are the same between packages as well within the same year range (92-94, 95-02, 03+).
A panther owner with base-RAS can simply swap the rear air springs in favor of HPP air springs and enjoy an HPP-spec rear spring rate.
Arnott Industries has recently begun manufacture of aftermarket 'Limo' rear air-springs. These aftermarket units have an aluminum piston, instead of the plastic. They are still HPP/Limo/MM rate, however.

Arnott also manufactures direct replacement aftermarket air suspension parts for panther RAS, at significantly lower cost than Ford.

A factory RAS system is not easily retrofitted into a non-RAS panther, but can be done.
Steel coils can be swapped in place of the air-springs, you will also need the spring insulators between the top of the coil and frame (D9AZ-5536-A)
Rear springs interchange '79 to current for panther platform vehicles, it is recommended to use *new* current production coil springs.
Related info and part numbers on 2vmodular's page: http://www.p71interceptor.com/rearsprings
The RAS is a very nice feature, it would be a shame to get rid of it over minor complications. It is very durable, and often will last the life of the vehicle. The air springs are naturally the most common failure point, and if overlooked cause a chain reaction of failures (relay and compressor)

[guspech750]

Damn good info.


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DTR + 4.10's + Eaton swap = Wreeeeeeeeeeeeeeedom

[maineiac]

Should be a sticky,real good info we all will need someday!

[lifespeed]

I read that link. It leads me to believe it is the ratio of the piston areas (pounds per square inch) that sets the rate.

I'll compare the Arnott towncar "heavy duty" dimensions when they arrive, and post the numbers. Not to mention driving impressions, although at that point it will all have been replaced.

[jb513]

Ordered and used this kit on mine. Can't beat the price for a complete system.


Suncore Industries (http://stores.ebay.ca/Suncore-Industries)

Bread Crumb Link

eBay Motors (http://www.ebay.ca/sch/eBay-Motors-/6000/i.html) >
Parts & Accessories (http://www.ebay.ca/sch/Parts-Accessories-/6028/i.html) >
Car & Truck Parts (http://www.ebay.ca/sch/Car-Truck-Parts-/6030/i.html) >
Suspension & Steering (http://www.ebay.ca/sch/Suspension-Steering-/33579/i.html) >
Shocks & Struts (http://www.ebay.ca/sch/Shocks-Struts-/33590/i.html)

[MrBluGruv]

I went with the HD coil spring conversion from Suncore. Worked great and I never encountered a situation where the rear end drooped too low from weight, nor did I encounter a situation where the car rode uncomfortably.

[lifespeed]

It's the shape of the bottom "cone" that determines the spring rate. Arnott used to note that the limo bags were the higher rate. I can't speak to the Panther bags but the Mark and Continental bags/struts I've bought from them over the years have been high quality.

Yes, rate of volume displacement per inch of travel. The Arnott bags are made by Continental.

[lifespeed]

I went with the HD coil spring conversion from Suncore. Worked great and I never encountered a situation where the rear end drooped too low from weight, nor did I encounter a situation where the car rode uncomfortably.

While this definitely is in the category of personal preference, I find the high load and towing capacity of this car (which I sometimes use) highlights the advantages of airbags.

[justbob]

Hell, I've used my car like a pick up truck over the years! Bagged mulch, dirt, salt, sand, plasma tv's, lawn mower, tools, 4.6 engine, engine crane, and my wife (well almost, long story).

I would never ever ever go coil springs as I USE my car and one major selling point is always maintaining ride height.


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[F8LBITEva]

I wonder if they make a bolt in adjustable Air ride kit for the Marauder. That would be sweet

[MrBluGruv]

I don't really get the ride height argument, I've seen it on here before, but I guess it's cause I've never pulled a trailer? Never have I ever had a situation where, with the HD coil springs, the rear end drooped. Ever. With full luggage and with 4 people in the car. I just don't get it. Do most trucks come with rear bag springs? Or is what I've always thought correct and the air bag suspension was put into this car for a more luxury-oriented ride while still maintaining some level of performance handling?

[btvollmuth]

Arnott industries makes replacement air suspension stuff. I'm not sure if your looking for direct replacement or a custom air suspension kit

Huge +1 on the Arnott industries. I used their re-engineered Airmatic struts on my 05 MB S500. Much better than OEM.

[EMAS]

I don't really get the ride height argument, I've seen it on here before, but I guess it's cause I've never pulled a trailer? Never have I ever had a situation where, with the HD coil springs, the rear end drooped. Ever. With full luggage and with 4 people in the car. I just don't get it. Do most trucks come with rear bag springs? Or is what I've always thought correct and the air bag suspension was put into this car for a more luxury-oriented ride while still maintaining some level of performance handling?

The standard soft riding cars come with steel springs, the bags whether standard of HPP rider firmer than the non P71 units. Now I've never had aftermarket HD springs. The plus I see is that in addition to always maintaing the same ride height it always handles the same. Now I haven't loaded up an engine, transmission, 10 bags of concrete, or a bunch or retaining wall blocks in my Marauder but I have in my HPP CV and it handled just the same as well as riding at the same height. When I went to pickup one of the engines I carried in it the people were like where's your truck and I said it's going in that car. They said it won't work you'll bottom out. I said no worries it won't affect it. They put it in and said "see" and I closed the trunk waited a few seconds and said "see" as it leveled out. I consider putting steel in ruining a car that came with bags after having several with both styles.

[lifespeed]

I don't really get the ride height argument, I've seen it on here before, but I guess it's cause I've never pulled a trailer? Never have I ever had a situation where, with the HD coil springs, the rear end drooped. Ever. With full luggage and with 4 people in the car. I just don't get it. Do most trucks come with rear bag springs? Or is what I've always thought correct and the air bag suspension was put into this car for a more luxury-oriented ride while still maintaining some level of performance handling?

I have a 5000 lb hitch from Valley Industries that I tow with occasionally. With a coil spring rate appropriate for normal performance use, 4 - 5 passengers and a full trunk will indeed lower the ride height. By definition, it has too, if you're sprung correctly unloaded. Might not be enough to drag the bumper, but still a change.

Personal preference, I prefer airbags.

[MrBluGruv]

I have a 5000 lb hitch from Valley Industries that I tow with occasionally. With a coil spring rate appropriate for normal performance use, 4 - 5 passengers and a full trunk will indeed lower the ride height. By definition, it has too, if you're sprung correctly unloaded. Might not be enough to drag the bumper, but still a change.

Personal preference, I prefer airbags.

But don't the bags have a finite range for spring rate (or whatever the equivalent term is for bag suspension, if it's different) as well? If they have the same max, wouldn't the load being presented to them at the limit cause them to sag the same? I need to dig up the site again, but I was under the impression that the spring rate of the HD coils I bought was actually greater than the stock bag suspension as well, and aside from always being at max height, the car rode and felt exactly the same, with the possible exception of being a little tighter in lateral motion from the rear end.

Is there an actual benefit to bag suspension for towing other than maintaining ride height?

[lifespeed]

But don't the bags have a finite range for spring rate (or whatever the equivalent term is for bag suspension, if it's different) as well? If they have the same max, wouldn't the load being presented to them at the limit cause them to sag the same? I need to dig up the site again, but I was under the impression that the spring rate of the HD coils I bought was actually greater than the stock bag suspension as well, and aside from always being at max height, the car rode and felt exactly the same, with the possible exception of being a little tighter in lateral motion from the rear end.

Is there an actual benefit to bag suspension for towing other than maintaining ride height?

The air bags do have a spring rate, and it is determined by air pressure and piston area, which in turn is related to ride height. Some are mistaken in thinking of airbags as a cure-all panacea that can operate correctly at any ride height. This is not true: if you lower the rear ride height excessively, you have reduced the air pressure and corresponding spring rate. This will, of course, affect handling and ride.

However, with the leveling sensor adjusted to a height that results in an pressure producing an appropriate spring rate (near stock height), increasing the load in the rear results in increased air pressure with a corresponding increase in spring rate to maintain ride height. This is exactly what you want, stiffer "springs" to carry the heavier load. So this is the advantage for towing, the ability to accomodate a wide range of loads by varying the effective spring rate, resulting in a constant ride height as well.

Coil springs do work very well. Their only down side is they are correct over a small range of load capacity. If you stiffen the coils to accomodate heavy loads, when you are driving around unloaded they are too stiff for optimum performance.

Edit: my understanding is the spring rate upper limit is constrained only by available air pressure and the max psi at which the bags can safely operate.

[MrBluGruv]

The air bags do have a spring rate, and it is determined by air pressure and piston area, which in turn is related to ride height. Some are mistaken in thinking of airbags as a cure-all panacea that can operate correctly at any ride height. This is not true: if you lower the rear ride height excessively, you have reduced the air pressure and corresponding spring rate. This will, of course, affect handling and ride.

However, with the leveling sensor adjusted to a height that results in an pressure producing an appropriate spring rate (near stock height), increasing the load in the rear results in increased air pressure with a corresponding increase in spring rate to maintain ride height. This is exactly what you want, stiffer "springs" to carry the heavier load. So this is the advantage for towing, the ability to accomodate a wide range of loads by varying the effective spring rate, resulting in a constant ride height as well.

Coil springs do work very well. Their only down side is they are correct over a small range of load capacity. If you stiffen the coils to accomodate heavy loads, when you are driving around unloaded they are too stiff for optimum performance.

Edit: my understanding is the spring rate upper limit is constrained only by available air pressure and the max psi at which the bags can safely operate.


Mmk, that makes sense.

I suppose, then, that the only weakness in the stock bags would be if you could present them with a load with which the bags couldn't hold enough PSI of air to accommodate without rupturing. I'm guessing no one here has done that yet though, so moot point.

[EMAS]

Mmk, that makes sense.

I suppose, then, that the only weakness in the stock bags would be if you could present them with a load with which the bags couldn't hold enough PSI of air to accommodate without rupturing. I'm guessing no one here has done that yet though, so moot point.

I think it would be almost impossible to do so. Consider this, the HPP bags used in the Marauder are the exact same bags as used in Town Cars that were destined to become stretch limos. Ford authorised doubling the wheel base of said limos and they carry that extra load as well as more passengers w/o any problem. Certainly you could eventually reach a point where higher pressure than they could handle would be needed to maintain the ride height but it has too be very very high.

[justbob]

When you load up, the car rides the same height, but handling is compromised. It doesn't feel anything like a MM, just looks normal.


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[burt ragio]

You do want the Arnott "limo" bags, the plus is they have billet aluminum bases instead of plastic but they are the correct HPP/Marauder/Limo/Livery spring rate. IIRC that's 130lbs instead of the 120lb standard units.

After trying three mfgs for rear shocks I have found unless I have an extra 200 lbs or more in the trunk the results are a harsh ride. If the day comes I need new rear air bags I will go with 120 lb standard bags. Or if I understand I can also lower rear ride height resulting less air in bags & lowering the lb rate ?

[EMAS]

Yes lowering the rear ride height results in lower pressure in the bags which means a softer ride. However you have to lower it significantly to soften it up significantly. Having cars with both the standard and HPP bags I've not noticed a real difference in one riding harder or softer than the other.

[OneBADLsE]

Ive found the exact opposite.

Lowering the car increases the ride harshness. I did so in my Mark 7...Made the car handle a thousand times better! The more air in the bags, the softer the ride was. Now, if you're talking about overfilling a bag, that's a completely different story.

Just stating observation

[ctrlraven]

So after reading the thread a few times if someone wants to replace theirs are they to order the one for the CV/MGM or TC from Arnott?

[lifespeed]

So after reading the thread a few times if someone wants to replace theirs are they to order the one for the CV/MGM or TC from Arnott?

I believe the ones from Arnott are the same higher rate for the Marauder, just better quality materials and cheaper than Ford.

Edit: I bought and installed a set. They are not the same rate, but are higher. Different installed height too.

[lifespeed]

After trying three mfgs for rear shocks I have found unless I have an extra 200 lbs or more in the trunk the results are a harsh ride. If the day comes I need new rear air bags I will go with 120 lb standard bags. Or if I understand I can also lower rear ride height resulting less air in bags & lowering the lb rate ?

An interesting comment. Are you using shocks for a coil-spring car? I wonder if the shocks must be valved for air bags.

[ctrlraven]

I believe the ones from Arnott are the same higher rate for the Marauder, just better quality materials and cheaper than Ford.
Arnott doesn't sell a "Marauder" kit, just CV, MGM and TC. I am just unsure of which to order.

[RubberCtyRauder]

I have been under the impression that the town car limo air springs are the ones to use for Marauder, otherwise they will be a softer ride, not the sportier feel.

Suncore makes or markets a "Marauder specific" air spring. There are links in this thread for both the town car limo from Arnott and the marauder one from Suncore. I've never tried either or know anyone who has so I don't have any feedback about either. **Update** after researching Suncore site..The same part number for the airbag is listed for Marauder, CV, MGM (40F 15R) So not sure if the valving is the same which i am guessing it is. maybe if they have tech dept. ,not customer service, they could tell you more.

Did you see if Tasca or other online Ford parts has marauder air springs still avail? Tasca did at one point over a year ago.

[lifespeed]

Arnott doesn't sell a "Marauder" kit, just CV, MGM and TC. I am just unsure of which to order.

I used the Town Car/Limo airbags, which are supposed to be the high rate.

[ctrlraven]

I used the Town Car/Limo airbags, which are supposed to be the high rate.
How have they been for you?

[lifespeed]

How have they been for you?

They look like quality. Can't tell you about the ride as I just put them in a couple days ago (http://www.mercurymarauder.net/forums/showthread.php?t=84895)and am still in shock calibration mode (Penske 7500DA double adjustable).

[lifespeed]

How have they been for you?

I have some air spring experiences to share, please see this post (http://www.mercurymarauder.net/forums/showpost.php?p=1268835&postcount=1).

[L.Mark]

Thanks, I know there was them and I think Suncore or something like that.

Even though this says 1992-2011 GM, would this have the correct rate for our car?
https://www.arnottindustries.com/part_MERCURY_yid3_pid20_gid463 .html

I'd be leary of Suncore. I bought a replacement bag for my LSC from them because they use an original assembly which was just plain better. I had it installed by the shop I use on all my cars and as they were airing it up it blew because the rubber wasn't tucked down far enuff. I called to get a replacement ASAP since I needed the car(it took several days longer to get it the first time than they said it would). They were in the middle of moving. I relayed that I needed the replacement now and couldn't wait for me to send the bad one back and they send out a new one. The lady on the phone said I was getting rude and angry. Rude no, angry yes. When she looked up my order in the computer she was giving me wrong info across the board so I would stop her every time. Finally had to talk to the manager. Got the replacement and no problem, but probably won't do business with them because of the way I was treated over the phone. Just my opinion.

[lifespeed]

The Marauder air bags are actually from a TC Limo, so I would ask the rep at either Arnott or Suncore to verify that their springs are the correct rate (102 lbs/in).

Oh yeah, they're also the same as an HPP-equipped CV or GM.

I just pulled out my new Arnott towncar/limo air springs. They worked horribly and were very bouncy. Too stiff. Got new OEM in there now, much better.

Don't buy the Arnott bags, get OEM.

[lifespeed]

You do want the Arnott "limo" bags, the plus is they have billet aluminum bases instead of plastic but they are the correct HPP/Marauder/Limo/Livery spring rate. IIRC that's 130lbs instead of the 120lb standard units.

Anybody actually use these things besides me? I'd be interested to hear other experiences. They were a disaster with my setup.

[lifespeed]

Ive found the exact opposite.

Lowering the car increases the ride harshness. I did so in my Mark 7...Made the car handle a thousand times better! The more air in the bags, the softer the ride was. Now, if you're talking about overfilling a bag, that's a completely different story.

Just stating observation

Bump stops.

[ctrlraven]

I wonder how the Suncore ones are vs OEM.

[lifespeed]

I wonder how the Suncore ones are vs OEM.

Never tried them. L. Mark posted in this thread (http://www.mercurymarauder.net/forums/showpost.php?p=1269241&postcount=54) he had a bad experience with their quality control and customer service. Even if their quality control is OK for your purchase, will they really be the same rate?

After my Arnott experience I would be shy of using anything but OEM for this critical ride-and-handling component of our cars. Yes, they are more expensive, but you can buy them online for only $260/each. :D

[cougar9150]

I wonder how the Suncore ones are vs OEM.

Made my first MM bouncy ass hell in the rear. When i had to change the bags on this one I picked up 2 Town Car airbags on ebay for 99 each.

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[lifespeed]

Made my first MM bouncy ass hell in the rear. When i had to change the bags on this one I picked up 2 Town Car airbags on ebay for 99 each.

Interesting. And I suppose the Towncar air springs were OEM with cream top, black bottom pistons just like our Marauders?

[cougar9150]

Interesting. And I suppose the Towncar air springs were OEM with cream top, black bottom pistons just like our Marauders?

Yup, identical to the OEMs I took out.

Sent from my SPH-D710 using Tapatalk 2

[lifespeed]

Yup, identical to the OEMs I took out.

Based on your and my experiences I will conclude that running airbags other than OEM are likely to result in unsatisfactory ride quality.

[drgnrdr33]

I installed Arnott air springs two weeks ago and have put on a couple hundred miles since then. I used the air springs specified for CV, GM, Marauder, etc. As far as I can tell, there is little to no difference between the original ride and the ride with the replacements. If anything, the ride is very slightly less harsh. I still feel all the bumps in the road I used to feel. 150k miles ago I installed upgraded sway bars front and rear. With the replacement air springs I still have no sense of the MM handling like a boat, etc, as I have felt with older GMs, towncars, etc. I'm quite pleased with the results, especially after riding on the bump stops for a week. :D

I use my MM as a daily driver. I dont race or go to the drag strip etc, so cant comment on how these air springs would be different from the originals in those situations.