DSE Rear Speed Kit 3 - Factory GM 12-Bolt - 3 Inch Axle Tubes (043121DS) - 1978-1988 GM G-Body
Upgrade your GM G-Body with a rear suspension package engineered to work as a complete system with the Detroit Speed Rear Speed Kit 3. Part number 043121DS is designed for 1978-1988 GM G-Body applications equipped with a factory GM 12-bolt rear axle and 3 inch axle tubes, excluding wagons. Detroit Speed developed its G-Body Speed Kits to maintain optimum suspension geometry and tire contact throughout the full range of rear suspension travel, giving your build a more controlled and performance-focused foundation.
A key component of 043121DS is Detroit Speed's patented Swivel-Link rear-link system. These links allow the rear suspension to fully articulate without binding and without relying on noisy spherical rod ends. The Swivel-Link design also makes it possible to adjust pinion angle and wheelbase without unbolting the links from the vehicle. Detroit Speed combines this rear-link technology with non-adjustable shocks, 175 pounds per inch springs with an 11 inch free length, and new hardware for a comprehensive Rear Speed Kit 3 package engineered specifically around the G-Body platform.
Specifications
- Manufacturer: Detroit Speed
- Part Number: 043121DS
- Product Type: Rear Speed Kit
- Speed Kit Level: Speed Kit 3
- Position: Rear
- Application: 1978-1988 GM G-Body
- Rear Axle: Factory GM 12-bolt
- Axle Tube Diameter: 3 inches
- Shock Type: Non-adjustable
- Spring Rate: 175 pounds per inch
- Spring Free Length: 11 inches
- Rear Link Design: Patented Swivel-Link system
- Pinion Angle: Adjustable
- Wheelbase: Adjustable through Swivel-Link rear links
- Hardware: New hardware included
- Wagon Compatibility: Not compatible
Features
- Rear Speed Kit 3 engineered specifically for 1978-1988 GM G-Body applications
- Designed for vehicles equipped with a factory GM 12-bolt rear axle and 3 inch axle tubes
- Integrated rear suspension package engineered to maintain optimum geometry throughout suspension travel
- Designed to maintain tire contact through the full range of rear suspension movement
- Patented Detroit Speed Swivel-Link rear links eliminate suspension bind
- Allows the rear suspension to fully articulate without using noisy spherical rod ends
- Adjustable pinion angle provides valuable control over rear suspension and driveline setup
- Pinion angle can be adjusted without unbolting the Swivel-Link from the vehicle
- Wheelbase can also be adjusted without removing the links from the vehicle
- Proper pinion-angle setup can improve traction and help reduce driveline vibration
- Includes non-adjustable rear shocks
- 175 pounds per inch rear spring rate
- 11 inch spring free length
- Includes new installation hardware
- Designed as a matched rear suspension package for performance-oriented GM G-Body builds
Fitment
- 1978 GM G-Body with factory GM 12-bolt and 3 inch axle tubes, excluding wagon
- 1979 GM G-Body with factory GM 12-bolt and 3 inch axle tubes, excluding wagon
- 1980 GM G-Body with factory GM 12-bolt and 3 inch axle tubes, excluding wagon
- 1981 GM G-Body with factory GM 12-bolt and 3 inch axle tubes, excluding wagon
- 1982 GM G-Body with factory GM 12-bolt and 3 inch axle tubes, excluding wagon
- 1983 GM G-Body with factory GM 12-bolt and 3 inch axle tubes, excluding wagon
- 1984 GM G-Body with factory GM 12-bolt and 3 inch axle tubes, excluding wagon
- 1985 GM G-Body with factory GM 12-bolt and 3 inch axle tubes, excluding wagon
- 1986 GM G-Body with factory GM 12-bolt and 3 inch axle tubes, excluding wagon
- 1987 GM G-Body with factory GM 12-bolt and 3 inch axle tubes, excluding wagon
- 1988 GM G-Body with factory GM 12-bolt and 3 inch axle tubes, excluding wagon
Fitment Note: Detroit Speed 043121DS is specifically designed for 1978-1988 GM G-Body applications equipped with a factory GM 12-bolt rear axle and 3 inch axle tubes. Wagon applications are excluded. Because rear axle swaps are common on G-Body vehicles, verify both the rear axle type and actual axle tube diameter before ordering.
FAQs
What rear axle does Detroit Speed 043121DS fit?
Detroit Speed specifies 043121DS for 1978-1988 GM G-Body applications equipped with a factory GM 12-bolt rear axle with 3 inch axle tubes. Verify the rear axle currently installed in the vehicle before ordering.
What does the Detroit Speed Swivel-Link system do?
Detroit Speed's patented Swivel-Link rear links allow the rear suspension to fully articulate without binding or requiring noisy spherical rod ends. The links also allow pinion angle and wheelbase adjustments without being unbolted from the vehicle.
Does Detroit Speed 043121DS fit a G-Body wagon?
No. Detroit Speed specifically excludes wagon applications from the fitment for part number 043121DS.
Why Buy Detroit Speed from Beefcake Racing?
Beefcake Racing is your source for Detroit Speed suspension components for performance street cars, pro-touring builds, autocross combinations, and track-focused vehicles. Matching the correct Speed Kit to the rear axle actually installed in your G-Body is critical to getting the right suspension package the first time. Questions about Detroit Speed 043121DS or your GM G-Body suspension setup? Email sales@beefcakeracing.com or call 1-855-827-7223.
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