Ground Control Coilover Conversion Kit for 1975-1983 BMW 3 Series RWD (E21) 2010

Ground Control

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SKU: 2010

Ground Control Coilover Conversion Kit for 1975-1983 BMW 3 Series RWD (E21)

$599.00
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Fitment Notes

All fitment information on our website is provided by the manufacturer. It is the customer's responsibility to thoroughly read the product description and confirm fitment before placing an order and proceeding with installation.

Unless specified otherwise, all suspension products are designed for 2WD vehicles only. Any notes or descriptions related to electronic damping systems (EDC, DDS, etc.) apply strictly to vehicle fitment. Aftermarket coilovers are not compatible with OEM electronic damping control systems unless explicitly stated.

*Product images may not represent the actual SKU.

Handling Time

All handling times are estimates and may change at any time.

  • In-Stock: 1-2 business days
  • Out of Stock: TBD
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Manufacturer Warranty

Ground Control suspension products are backed by a warranty against defects in materials and workmanship. For street-driven applications, Ground Control offers a lifetime warranty to the original owner on eligible Ground Control-manufactured components, while racing products are covered for 90 days against failure and excessive wear, with a 1-year limited warranty on non-moving components. Warranty coverage excludes damage caused by improper installation, misuse, accidents, modifications, insufficient suspension travel, normal wear items, or use with incompatible parts. Warranty claims are evaluated on a case-by-case basis, and proof of purchase may be required. For complete warranty terms, exclusions, and claim procedures, please refer to the manufacturer’s full warranty documentation.

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Product Details

Ground Control Coilover Conversion Kits for the 1975-1983 BMW 3 Series RWD (E21) add adjustable ride height and corner balance. The threaded spring perch system lowers the car and reduces body roll, and it works with stock or aftermarket struts.

Every kit is hand-built in the USA and backed by a lifetime guarantee on the complete assembly, not just the springs. Ground Control is the West Coast distributor for Eibach ERS race springs, which are warrantied for life against sag and rate change. The anodized 6061-T6 aluminum adjusters lock securely under load.

Standard Features

  • Ride-height adjustable threaded spring perch system
  • Eibach ERS race springs with lifetime warranty against sag and rate change
  • Any race or street spring rate available on request
  • 6061-T6 anodized aluminum adjusters with square-cut threads that lock under load
  • Setscrew-secured spring seat holds your ride-height setting in place
  • Upper spring perches insulate the spring for quieter operation
  • Designed to work with stock or aftermarket dampers
  • Adjustment wrench provided where required
  • Hand-built in the USA with a lifetime guarantee on the complete kit, not just the springs
Specifications
Part Number 2010
Part Name Ground Control Coilover Conversion Kit
Vehicle 1975-1983 BMW 3 Series
Chassis E21
Drivetrain RWD
Approximate Drop (inches) - Front 0 to -2
Approximate Drop (inches) - Rear 0 to -2
Ride-Height Adjustable Yes
Springs Eibach ERS (any rate available)
Notes Removal of the stock spring seat and welding required; kit does not include dampers
Important Fitment Note

This is a spring-and-adjuster conversion kit and does not include dampers. It installs over your stock or aftermarket struts, and removal of the stock spring seat plus welding is required.

Vehicle fitment

This product fits the vehicles listed below.

YearMakeModelDrivetrainNotes
1975BMW320iRWDRemoval of the stock spring seat and welding required; kit does not include dampers
1976BMW320iRWDRemoval of the stock spring seat and welding required; kit does not include dampers
1977BMW320iRWDRemoval of the stock spring seat and welding required; kit does not include dampers
1978BMW320iRWDRemoval of the stock spring seat and welding required; kit does not include dampers
1979BMW320iRWDRemoval of the stock spring seat and welding required; kit does not include dampers
1980BMW320iRWDRemoval of the stock spring seat and welding required; kit does not include dampers
1981BMW320iRWDRemoval of the stock spring seat and welding required; kit does not include dampers
1982BMW320iRWDRemoval of the stock spring seat and welding required; kit does not include dampers
1983BMW320iRWDRemoval of the stock spring seat and welding required; kit does not include dampers

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