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 Kit Class: Premium Warranty: Lifetime

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

Strutmasters 2005-2011 Cadillac STS Rear Air Shock To Coil Spring Shock 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

Conversion Kit Features

  • Saves Money
  • All New Components
  • Eliminates The Air Suspension
  • More Reliable Than Air Suspensions
  • Easy To Install
  • No Modifications Required To Install
  • Premium Eibach Springs

Air Suspension Conversion Kit Includes

  • 2 Rear Eibach Coil Springs
  • 2 Rear Premium Shocks
  • All Necessary Hardware
  • Detailed Instructions

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
  • Fits AWD models, ONLY! This kit will not physically fit RWD models.
  • To remove warning light we recommend our 4-wheel conversion kit with our warning light elimination module

Price Comparison

How Does Strutmasters Measure Up?

2005-2011 Cadillac STS OEM Replacement Parts:

+ Rear Shocks ($690/strut)
+ Compressor and Dryer Assembly ($859)
= TOTAL: Over $2,260 (and that doesn’t even include replacing electronic components that are known to fail such as the height sensors).

After Market Replacement Parts:

+ Rear Air Shocks ($690/strut)
+ Compressor and Dryer Assembly ($210)
= TOTAL: Over $1,500 (and that doesn’t even include replacing electronic components that are known to fail such as the height sensors).

Strutmasters Conversion Kit:

+ 2 Rear Shocks
+ 2 Rear Eibach Springs
+ 2 Mounts
+ Detailed Installation Instructions
+ Over-The-Phone Technical Support And A Limited Lifetime Warranty =

  • Our Price: $399.00!

Additional Info

Learn why Strutmasters is the best choice for your new kit.

long-icon-questionWhy Choose Strutmasters?

Why choose the Conversion Kit over replacing the air suspension system on your 2005-2011 Cadillac STS?

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 a headache and trip to the dealership. Our kit will save you time and money- there’s no reason not to convert today.

long-icon-xIs Your Suspension Failing?

How do I know if my 2005-2011 Cadillac 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.

long-icon-gearVehicle Components

What kind of suspension does my 2005-2011 Cadillac STS have?

The 2005-2011 Cadillac STS is built with the following suspension components:

2005-2011 Cadillac STS Electronic 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.

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 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 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 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.


Overall Savings

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

  • $1,861

    in Savings

  • 82%

    Less Than Dealer

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