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Ground Control - E21 S/A Coilover Kit (Complete Package)
$1550.00Purchase Ground Control - E21 S/A Coilover Kit (Complete Package)
Ground Control coilover kit for the BMW E21 is your ticket to serious handling performance!
Provided here is a comprehensive package to finally upgrade your E21 and get the true street or track performance you have been craving...
After some persuading, we got Ground Control to bring back their unique E21 kit, and now at a better price than ever...
Customer seeking to transform their E21 into optimal performance machines have found that even the popular H&R + Bilstein setup is maybe not as sporty as they desire: high ride height leaves wheel gap, low spring rates can't keep up with today's higher grip tires, ride height is not adjustable to suit the drivers needs...
OK for most street cars, but if your looking to get the most out of your E21 than this is probably not what you were looking for.
The Ground Control package for these BMWs is a proven winner:
We recommend this kit for the customer that wants the best looking ride height and stance, spring rates on demand, height adjustability, and most importantly: high function for performance driving.
If you plan on Autocorossing, or doing serious Drivers School days with your E21, coilovers are a must.
A koni based solution means that if you select mils spring rates, your car will
look great and ride fantastically too! You may call or email us to find out what spring rates are best for your needs.
VAC Tech's Tip:
As the E21 chassis isn't as ridged as the later E30 3-series, and is lighter; we recommend keeping the spring rates a bit lower than one might expect. This will keep ride quality a bit better and keep the tires contact patch connected to the pavement for higher grip levels
and better cornering.
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The complete GC kit for the E21 includes:
- GC E21 Front Camber Plates
- GC E21 Rear shock mounts, (lifetime warranty)
- GC Bump Stops for all four dampers
- GC Easy to change billet height-adjustment collars and adjusters
- Eibach Linear Springs, in your rate of choice (lifetime warranty)
- Coilover compatible special stroke Koni Front strut inserts
- Coilover compatible special length Koni Rear shocks
- Available for ALL E21 Models, but please specify in box above.
- If you cannot decide on a spring rate, you may specify your general outline of use
of your car in this box as well.
Popular Spring Rate Combos Controlled & Comfortable 300 lbs/in Front
250 lbs/in RearSporty Street Use 350 lbs/in Front
300 lbs/in RearHard Street &
Track day440 lbs/in Front
350 lbs/in RearMostly Track 500 lbs/in Front
440 or 500 lbs/in RearInstall Notes: Pro install recommended, assembly and welding are required by the end user for E21 coilovers.
For those who want the ultimate Ground Control setup, GC can will reinforce mounting points, installing spring perches/ sleeves, assemble nad and powder coat your struts casings (as seen in the photo) for $225 (select this option above, this service requires your strut housings to be mailed in)
- SKU: GC-SACK-E21
- Front Spring Rate: (250 Lbs) / (4.47 kg/mm); (300 Lbs) / (5.35 kg/mm); (350 Lbs) / (6.25 kg/mm); (440 Lbs) / (7.85 kg/mm); Please call / email me to help, after my order
- Rear Spring rate: (250 Lbs) / (4.47 kg/mm); (300 Lbs) / (5.35 kg/mm); (350 Lbs) / (6.25 kg/mm); Please call / email me to help, after my order
- Kit Style: Bolt on, with full length struts; Short/ DIY (for low ride hight / track cars); Short/ Mail in to GC (low ride hight / track cars)
- Engine Type: 4 cyl and 6cyl models
- Chassis Type: All E21 (inc 320, 323, 320/6, etc)
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(4) dampers ([2] front strut inserts, [2] rear shocks)
Ground Control valved Koni Front dampers:
Sport Strut inserts that offer extremely controlled body movement. Awesome modern technology for durability and street or track ready performance.
Ground Control valved Koni Rear shocks:
Aids in putting power to the ground and offers consistent body control. Tuned to dial the car to your liking, Koni shocks offer excellent traction in this regard
Ground Control Height adjustment:
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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.
- Pair (2) front Camber Plates:
Ground Control Racing Camber / Caster Plates More camber adjustment than stock, caster adjustment, aircraft bearings, 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 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.
4 Eibach ERS springs, (not pro-kit), with a race OR street spring rate:
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.
(4) Ground Control bump stops (made in Germany):
Ground Control Bump Stop We do not just ask you to reuse your stock bump. The stock bump stop is designed for stock suspension. GC provide a bump stop designed to work with their suspension. These are specialty foam, same quality as OE BMW parts, but made to our specs in Germany.
2 Rear ride height adjusters:
Ground Control Rear Ride Height Adjustment Kit Billet aluminum threaded adjusters press onto the top of the rear control arm.
A unique to Ground Control heavy duty design for great feel and control along with streetable comfort if needed. Reduced fatigue to chassis shock mounting points and better response from your suspension. 6061 aluminum and GC's lifetime guarantee.
Purchase Ground Control - E21 S/A Coilover Kit (Complete Package)
Other products in the category Suspension / Coilover Suspension (Street & Track kits) / Ground Control:
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