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2005-2011 Cadillac STS RWD 4 Wheel Air Suspension Conversion Kit
We are currently transitioning from red to black springs. Item may differ slightly from photo.

2005-2011 Cadillac STS RWD 4 Wheel Air Suspension Conversion Kit

$649.00Add to cart

For Special Shipping Options:

(866) 597-2397

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Kit Class: Premium Warranty: Lifetime

Convert Your Air Suspension To A Passive Coil Spring Suspension. End Your Air Suspension Problems Forever...

Strutmasters 2005-2011 Cadillac STS Air To Coil Spring Conversion Kit is the perfect solution to your air suspension problems. Designed to be very affordable, you can convert your air suspension to use standard struts and coil springs for less than the price of replacing one electronic strut

This Conversion Kit Fits

2005 Cadillac STS, 2006 Cadillac STS, 2007 Cadillac STS, 2008 Cadillac STS, 2009 Cadillac STS, 2010 Cadillac STS, 2011 Cadillac STS

Product Notes

  • Fits 3.6L LY7 V6 And 4.6L Northstar V-8 Models
  • This kit WILL NOT work with a Cadillac STS-V
  • Fits RWD models, ONLY! This kit will not physically fit AWD models.
  • Made In USA
  • Limited Lifetime Warranty
  • Made With Glide Ride Technology


Vehicle Info

  • Year: 2005-2011
  • Make: Cadillac
  • Model: STS
  • Manufacturer: Strutmasters

Air Suspension Conversion Kit Includes

These are the components and materials you can expect to find shipped with your new purchase.

  • 2 Front Struts
  • 2 Premium Front Coil Springs
  • 2 Rear Eibach Coil Springs
  • 2 Rear Premium Shocks
  • Electronics to Remove Check Suspension Message
  • All Necessary Hardware
  • Detailed Instructions

Shipping Info

All of our products have shipping options available to guarantee you get your part in a timely and affordable manner.

  • Next Business Day: Delivery typically by 10:30 a.m.
  • 2 Business Days: Delivery typically by end of day
  • 1-5 Business Days: Delivery based on distance to destination
Tour Strutmasters

Manufactured, Packaged and
Shipped in North Carolina, USA

All of our conversion kits are manufactured, packaged and shipped from our warehouse right here in Roxoboro, NC, USA. We believe in providing the highest quality parts, such as premium american-made coil springs, to ensure our customers only need to buy the right product once.

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Features & Benefits

Strutmasters Conversion Kits Save Money, Time and Headaches

2005-2011 Cadillac STS RWD 4 Wheel Air Suspension Conversion Kit is the perfect solution to your air suspension problems. Designed to be very affordable, you can convert your air suspension to use standard.

Our Conversion Kits are built to improve the performance and stability of your ride. Converting to a non-air suspension system gives you a more reliable ride.

Our kits don't require any major modifications to your vehicle to install.

Only Strutmasters offers premium american-made coil springs on our conversion kits. Notice the difference with a better, smoother ride!

All of our kits come with easy to install instructions so you or your mechanic can get your car up and running faster than ever.

Why Choose Strutmasters Instead Of Those Other Guys

Our customers tell us they make the switch from their Cadillac STS air suspension to one of our non air suspension conversion kits because of the low price and high quality of the parts we use. The kit removes the complicated factory electrical components and includes two rear struts, two rear Eibach springs, and new mounts. It is conveniently installed in about one hour per wheel. Created with our loyal DIYers, it saves you the headache and trip to the dealership. Our kit will save you time and money- there’s no reason not to convert today.

How Do I know If My STS Air Suspension is failing?

Your 2005-2001 Cadillac STS has had a good run, but you may be noticing a failed or leaking air suspension. Look for these common signs of bad suspension. A suddenly noticeable uneven height difference between the left or right sides of the vehicle is an obvious one. A sagging rear or front end is another. Leaning, from any direction, is frequently seen. An overall squatting appearance in your Cadillac STS indicates a necessary repair. Other symptoms include an illuminated suspension warning light or message on the instrument panel, or an air compressor that has ceased working. If the air compressor is noisy and noticeable, this is another sign of suspension total failure. Check your Cadillac STS ride height frequently- in general, it should always be maintaining its appropriate ride height. If you suspect any issues with the suspension in your STS, getting it fixed is necessary before all other components begin to wear out.


Overall Savings

How does this part compare to OEM parts and other competitive solutions?

  • $2,851

    in Savings

  • 81%

    Less Than Dealer

OEM Replacement Parts:

+ Electronic Struts ($610/strut) + Coil Springs ($50/spring) + Rear Shocks ($699/strut) + Compressor and Dryer Assembly ($859)

After Market Replacement Parts:

+ Rear Air Shocks ($690/strut) + Compressor and Dryer Assembly ($210) + Front Variable Timing Struts ($370/strut) + Front Coil Springs (CAN'T FIND THESE ANYWHERE!) = TOTAL: Over $2,200

Strutmasters Conversion Kit:

+ 2 Front Passive Hydraulic Struts + 2 Front Eibach Springs + 2 Rear Passive Hydraulic Shocks + 2 Rear Eibach Coil Springs + 2 Electronic Resistors To Help Remove The Service Ride Control Message + Detailed Installation Instructions + Over-The-Phone Technical Support And A Limited Lifetime Warranty

Our Price: $649.00!

Suspension Components List

2005-2011 Cadillac STS Electronic/Magnetic Ride Control Struts (x2)- a type of shock absorber; has metal tubing filled with gas-charged hydraulic fluid that is connected to the wheel of a vehicle in order to reduce the effects of vertical travel on a rough surface which controls the bounciness, and therefore comfort, of a vehicle. The Cadillac Deville’s struts, while having coil-springs, use an electronic signal to stiffen or soften the dampening of the strut. Some models came with Magnetic Ride Control, which use polarized particles within the hydraulic fluid to either make the ride softer or more firm based on the electrical impulse sent from the suspension control module.

2005-2011 Cadillac STS Shock Absorbers (x2)- a metal tubing filled with gas-charged hydraulic fluid that is connected to the wheel of a vehicle in order to reduce the effects of vertical travel on a rough surface which controls the bounciness, and therefore comfort, of a vehicle shock absorbers.

2005-2011 Cadillac STS Air Lines- tubes that run from a compressor (air suspension) to the air struts which carry pressurized air to the air bags components in order to adjust the height of the vehicle, respectively.

2005-2011 Cadillac STS Solenoids (x4)- usually L-shaped, these plastic components connect the electrical connection and lines of suspension components to the suspension control module on vehicles with active suspension. The solenoid regulates the air pressure for each air spring. Solenoids start to leak as they wear out causing the vehicle to sag or to lean. This will cause the ride height sensor to send a signal to activate the compressor in an attempt to inflate the air suspension and level out the vehicle. This excessive work load will eventually lead to total failure of the compressor.

2005-2011 Cadillac STS Compressor- creates/sends pressurized to active suspension components. When the air suspension starts leaking, the compressor/pump starts working harder to try to keep the system inflated. By the time air suspension leaks down completely, sitting the vehicle on its tires, the compressor will either have failed or be well on its way to full failure. Buying replacement struts and taking the time to install them only to find out the compressor still needs to be replaced can be very frustrating, time-consuming, and expensive.

2005-2011 Cadillac STS Dryer Assembly- used to keep moisture out of air lines and air springs in order to prevent freezing and internal cracking of these parts. Once air suspension starts leaking, moisture will build-up throughout the air system. Moisture damages the air suspension from the inside. The dryer will need to be replaced in order to eliminate the moisture and prevent any further damage.

2005-2011 Cadillac STS Coil Springs (x2)- Coil springs hold the vehicle up but be careful, they are rated for and designed to work with the rest of the suspension system, so when you change air shocks to passive shocks, then you will need a different rated coil spring that works well with the new type of shocks.

2005-2011 Cadillac STS Suspension Control Module- a computer which is responsible for the operations of the air suspension system and maintaining the vehicle’s correct ride height.

2005-2011 Cadillac STS O-rings- Although they are the least expensive parts of the air suspension, they are responsible for maintaining the seal where all of the air lines connect. Be sure to replace the O-rings when repairing any air suspension system.

Performance You Can’t Find Elsewhere
Made With Premium American-Made Coil Springs

American Made Parts,
Unrivaled Quality

Get Your Parts When You Need Them
Fast Shipping Guaranteed

Professional Assistance and ASE Certified Tech Support
Those Other Guys Don't Offer


Real Customers, Real Reviews

Read reviews from people just like you looking for the perfect solution for their suspension needs.

Name: | Location: Evansville, wi | SKU: CH14F

I ordered all 4 struts and Springs. Also the electronic bypass kit. Everything was very easy and instructions were great. The before and after is night and day! It’s amazing! The car handled absolutely horrible before. Both rear air shocks were bad with holes in the bags. Front shocks were shot. The car rode like a boat. I’m very happy with the outcome.

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