QA1 RCK52340 Rear Coilover Kit 1964-72 GM A-Body Single Adj 150lb

Vehicle Fitment

• 1964-1972 Chevrolet Chevelle (all trims & body styles)
• 1964-1972 Chevrolet El Camino
• 1970-1972 Chevrolet Monte Carlo
• 1964-1972 Buick Skylark / Gran Sport
• 1964-1967 Buick Special
• 1964-1972 Oldsmobile 442 / Cutlass / F-85 / Vista Cruiser
• 1964-1972 Pontiac GTO
• 1964-1972 Pontiac LeMans
• 1964-1970 Pontiac Tempest
• 1969-1972 Pontiac Grand Prix
• 1971-1972 GMC Sprint

Fitment Notes

• Rear coilover conversion kit - sold as a complete pair with mounting brackets, two single adjustable shocks, two 12 in. springs (150 lb/in.), and all necessary hardware
• Converts the factory rear coil spring suspension to a fully adjustable coilover system - bolt-in installation, no cutting or welding required
• Ride height adjustment range: 1/2 in. higher than stock down to 2.25 in. lower than stock
• Designed for factory 1964-1972 GM A-Body 10-bolt and 12-bolt axle housings - lower shock mount bracket may not work with aftermarket rear end housings; modifications may be required
• Compatible with factory trailing arms; QA1 recommends pairing with adjustable trailing arms (5248 for 1968-72, or 5249 for 1964-67) for maximum performance and precise pinion angle control
• 150 lb/in. spring rate is QA1's soft option - recommended for drag racing applications or lighter-than-average A-Body builds; for the medium (street) rate, see RCK52359 (200 lb/in.)
• For double adjustable version with 170 lb/in. springs, see RCK52337
• Serviceable and rebuildable by QA1 authorized service centers
• Made in Lakeville, Minnesota, USA

Features

• Single adjustable Pro Coil shocks - 18 positions of simultaneous compression and rebound adjustment for easy ride tuning between street comfort and performance handling
• Fully threaded lightweight billet aluminum shock body allows easy ride height adjustment without changing spring rate
• 12 in. high-travel coil springs (150 lb/in.) with larger coil spacing - reduces unsprung weight, increases suspension travel, and reacts faster than conventional springs
• USA-made mounting brackets engineered specifically for the 1964-1972 GM A-Body rear suspension geometry - bolt directly to factory trailing arm and frame mount locations
• Eyelet-style lower mount on shocks for clean, low-bind mounting
• Clear anodized aluminum shock body for durability and corrosion resistance
• 100% dyno tested and serialized at the factory - every shock verified before shipping
• Limited Lifetime Warranty on single adjustable shocks when registered at QA1

Specifications

• Position: Rear (Both Driver & Passenger Side - sold as a pair)
• Shock Adjustability: Single - 18-position simultaneous compression + rebound
• Spring Length: 12 in.
• Spring Rate: 150 lb/in. (soft - drag race / light vehicle)
• Spring Finish: Silver powder coat
• Ride Height Range: +0.5 in. to -2.25 in. from stock
• Shock Body: Threaded lightweight billet aluminum, clear anodized
• Lower Mount Style: Eyelet
• Hardware: All mounting hardware included
• Quantity: Sold as a complete kit (pair)
• Warranty: Limited Lifetime (single adjustable shocks, registration required)
• Country of Origin: USA (Lakeville, MN)

Included Components

• 2x Single Adjustable Billet Aluminum Rear Coilover Shocks
• 2x 12 in. High-Travel Coil Springs (150 lb/in., silver powder coat)
• 2x Upper Shock Mounting Brackets
• 2x Lower Shock Mounting Brackets
• Complete Hardware Kit (bolts, washers, nuts)
• Installation Instructions

Product Description

The QA1 RCK52340 is a bolt-in single adjustable rear coilover conversion kit for all 1964-1972 GM A-Body vehicles - Chevelle, El Camino, Monte Carlo, GTO, LeMans, 442, Cutlass, Skylark, and more. It converts the factory rear coil spring suspension to an 18-position adjustable coilover system with the 150 lb/in. soft spring rate - ideal for drag racing or lighter A-Body applications. Ride height is adjustable from 1/2 in. above stock down to 2.25 in. below stock via the fully threaded billet aluminum shock body. USA-made mounting brackets bolt directly to factory suspension locations; no cutting or welding required. Includes two 12 in., 150 lb/in. springs, single adjustable billet aluminum shocks, and all hardware. Covered by a Limited Lifetime Warranty when registered at QA1. Made in the USA.

For factory 10/12 bolt axle housings only - modifications may be required for aftermarket housings. For the medium (200 lb/in.) spring rate, see RCK52359. For the double adjustable version, see RCK52337.