THIS KIT INCLUDES THE FOLLOWING: (click items for details)
Complete Front Strut Housing - Machined from seamless DOM 1026 steel alloy tubing.
Koni Single Adjustable Front Strut - Struts are externally adjustable from underneath the hood, even with the factory strut brace. This strut is prepared for coil over use, and eliminates machining of critical suspension components . The strut is also reinforced with a steel collar at the base to reduce flex.
Ground Control Threaded Sleeves - 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.
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 to match rear spring rates using our shock dyno. The Koni rear shocks are adjuistable for rebound, however it is not simple. The Ground control rear upper mount allows (forever) maintanence and adjustment without removing the package shelf , however the rear speaker grille is removed for access. We decided after getting road grimed during testing, that this was preferable to dirtier access from under the car.
Eibach Spring - Ground Control springs are made by Eibach 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 Stops - 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 OE 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 machined for the e39 M5, 4 inch height adjustment.
Ground Control Racing Camber / Caster Plates - More camber adjustment than stock, caster adjustment, aircraft bearing, engraved with calibrated degrees, with stainless steel reinforcement. Every component is anodized or plated, including fasteners. Adds extra travel to avoid excessive bottoming out, this is a very well engineered product. The stainless steel reinforcement prevents electrolysis between the steel fender and the aluminum camber plate.
Camber is quickly 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. Caster is adjustable, when necessary to correct the car, by changing a shim under the plate.
The Ground Control camber plates feature a urethane bushing that carries the side loads only, and does not rotate (no squeek!) and allows for articulation of the shock shaft. This urethane bushing is very under stressed, as the Ground Control design does NOT support the weight of the car on the urethane bushing. Instead, the weight of the car is supported by a completely separate rotating ball bearing, which is also manufactured in Germany. The entire assembly is machined at an angle, just like the stock upper mount. Beware of less expensive machining that bends the strut shaft after installation.
Ground Control Rear Shock Mount - Billet aluminum, urethane stem bushings and spring seat for noise damping. The urethane does not rotate, so squeeking is not an issue. Pre assembled. Includes new gaskets.
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.