QA1 · New
QA1 78-88 GM G-Body 12-200 Kit Rear Pro-Coil S-Adj
MPN RCK52366 · Store SKU qapRCK52366
Supplier stock checked 11/7/2026, 12:06:33 PM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
Get the perfect look by easily adjusting your ride height on your Monte Carlo or Cutlass. These rear coil-overs allow ride height adjustment up to 1" higher to 3" lower than stock. Dialing in the perfect stance on your G-body can be done in minutes. Single adjustable shocks allow you to simultaneously adjust shock valving to firm up or soften the ride. With registration, your shocks can be backed with a best-in-class Limited Lifetime Warranty. QA1 78-88 GM G-Body Big Wheel Rear Coilover Kit with single adjustable Proma Star shocks and 12", 200 lb. springs QA1 78-88 G-Body Big Wheel Rear Coilover Kit, Single Adjustable
Manufacturer fitment & guides
Check RCK52366 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y