ST Suspension has released an exciting new product that we think will set the suspension market on edge, the affordable 3-way adjustable coilover! Previously having 3-way damping adjustment was something only owners of expensive race shocks could experience. Now ST Suspension is offering a 3-way at an obtainable price point, the XTA Plus 3.
To evaluate the ST’s we used a car that we felt would be a solid representation of a typical application, an E92 M3. Now that these cars are affordable and are getting into the hands of second owners, this is a vehicle that should not only respond well to modifying the suspension but be a typical older performance sedan that has enough miles that a freshening of things makes sense.
The ST XTA Plus 3 kit consists of a front coilover strut, a rear shock with a race coil conversion with a height-adjustable spring seat. Having the spring divorced from the shock eliminates spring kinking force and actually can make for an improved ride and less tire shock.
The front coilovers have 7 kg springs up from the stock 2.9kg and the rear shocks use 12 kg springs up from the stock 9.8 kg. If the rear springs seem really stiff you have to consider that they are run far inboard with a lot of leverage on them so the wheel rate isn’t close to being that high.
The front coilovers have a sealed pillow ball mount with camber adjustment. The front rebound adjuster is also up here at the end of the shock shaft.
The rear shock rebound adjuster is at the top of the shaft as well.
The front strut high and low-speed compression adjusters are on the bottom of the strut tube. They are large and easy to reach with positive clicks.