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Add independent compression and rebound tuning to a classic Chevrolet B-body rear suspension.
QA1 part RCK52390 combines double adjustable aluminum shocks, 200 lb/in springs, and application specific bolt in brackets.
Key Features
- For RCK52390, double adjustable shocks with independent compression and rebound control
- 324 available valving combinations
- 12 inch 200 lb/in high travel springs
- Fully threaded aluminum shock bodies for ride height adjustment
- Bolt in brackets with no cutting or welding
- Dyno tested, serialized, rebuildable shocks
Fitment
| Years | Make | Model | Position |
|---|---|---|---|
| 1965-1970 | Chevrolet | Biscayne | Rear |
| 1965-1970 | Chevrolet | Impala | Rear |
| 1965-1967 | Chevrolet | Impala SS | Rear |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | RCK52390 |
| Position | Rear |
| Adjustment | Double adjustable |
| Valving | 18 compression by 18 rebound positions |
| Spring Length | 12 in |
| Spring Rate | 200 lb/in |
| Shock Body | Threaded aluminum |
| Installation | Bolt in |
What's Included
- RCK52390: 2 double adjustable shocks
- 2 high travel 200 lb/in springs
- Mounting brackets
- Installation hardware
About QA1
QA1 develops rebuildable adjustable shocks and suspension systems for classic and modern performance vehicles.
FAQ
What is the RCK52390?It is the exact manufacturer part number for this rear coilover system.
Which vehicles fit this system?It fits the listed 1965-1970 Chevrolet B-body applications.
Are the shocks double adjustable?Yes. Compression and rebound are adjusted independently.
How many valving combinations are available?The 18 compression and 18 rebound positions provide 324 combinations.
What springs are included?Two 12 inch springs rated at 200 lb/in are supplied.
Does installation require welding?No. The system is designed for bolt in installation.
Are the shock bodies aluminum?Yes. The fully threaded bodies are aluminum.
Can the shocks be rebuilt?Yes. QA1 or an authorized service center can rebuild and revalve them.
Installation Instructions
- Before installing RCK52390, support the vehicle securely and unload the rear suspension before beginning.
- Install the supplied brackets, shocks, and springs according to the application specific QA1 instructions.
- Apply anti-seize to the threaded shock bodies, set ride height only while unloaded, then torque all fasteners and verify clearance.
QA1
QA1 suspension parts are stocked at Black Ops Auto Works for American muscle cars and classic trucks. Shop coilover kits, shock absorbers, springs, handling kits, four link systems, sway bars, strut kits, rod ends, and suspension hardware for the Mustang, Camaro, Corvette, Challenger, Charger, and GM B-Body, F-Body, and G-Body platforms. Every product is filterable by year, make, model, trim, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 536 QA1 SKUs across coilovers, shocks, springs, and handling kit categories. What This Brand Covers QA1 is a suspension manufacturer known for adjustable coilover systems, shock absorbers, and complete handling kits built for muscle cars, classic trucks, drag cars, and pro touring builds. The lineup covers everything from single component shock replacement to full vehicle handling packages. Brand Focus QA1 concentrates on American muscle car and classic truck platforms, with deep coverage of GM, Ford, and ...
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