THIS KIT INCLUDES THE FOLLOWING: (click items for details)
Koni Single Adjustable Front Strut - Custom built and valved exclusively for Ground Control by Koni of Holland, or no charge option of Koni race strut. Strut inserts are externally adjustable from underneath the hood, even with the factory strut brace. This strut is designed for coil over use, and eliminates machining of critical suspension components. This system is designed to eliminate stress risers caused by machining notches into the strut housing. Unlike other companies that claim superiority by cutting threads into a critical component of the suspension, Ground Control uses engineering common sense to maximize the strength of the suspension. Welding is required for this race kit.
Ground Control Adjustable Spring Perch - A unique design, that uses an allen head bolt to clamp the single threaded perch into the correct position. No secondary pieces are needed to "jam" the threaded perch into position. This method of clamping onto the threads also prevents sand, grit, and water from getting into the threads, which is a common problem with jam nuts.
Koni Single Adjustable Rear Shocks - Preadjusted by Ground Control to match your rear spring rates using our shock dyno. Custom built and valved exclusively for Ground Control by Koni of Holland, which adjusts from inside the trunk or under the hood with no tools needed. Double adjust option available.
Ground Control Racing Camber/Caster Plates - More camber adjustment than stock, caster adjustment, aircraft bearings, and engraved with calibrated degrees. Every component is anodized or plated, including fasteners. Adds extra travel to avoid excessive bottoming out, this is a very well engineered product.
Camber and caster are separately adjustable by sliding the mounts, without removing any components from the car. The priority of this design is to allow fast, repeatable alignment changes at the track.
The Ground Control camber plates feature two sets of bearings, a proprietary bearing, made to our specs by Aurora in the USA, which allows for articulation of the shock shaft. This spherical bearing is very understressed, as the Ground Control design does NOT support the weight of the car on the spherical bearing. Instead, the weight of the car is supported by a completely separate articulating needle bearing, which is also manufactured for Ground Control in the USA.
Eibach Springs - Any spring rate is available. Eibach springs are made on German machines both in the USA and in Germany, however all Eibach springs have a lifetime guarantee against sagging, rate change, or any manufacturing or material failure. Lifetime guarantee. Compare!
Ground Control Bump Stop - We do not just ask you to reuse your stock bump. The stock bump stop is designed for stock suspension; we provide a bump stop designed to work with our suspension. These are soft foam, same quality as OEM BMW parts, but made to our specs in Germany. Our race bump stops are even different than our street bump stops.
Ground Control Rear Ride Height Adjustment Kit - Billet aluminum threaded adjusters bolt on top of the rear control arm. The E46 M has a larger diameter rear axle than the standard Z4, so it is necessary for clearance to not have any portion of the adjuster below the control arm.
Ground Control Rear Shock Mount - Billet aluminum, spherical bearings, pre-assembled. Includes gaskets and reinforcements.
All Ground Control products carry a lifetime guarantee against defects when
installed and maintained correctly. We strongly recommend that all of our products be installed by a competent, qualified mechanic.