QA1 RCK52358 Rear Pro Coil Kit Double Adj 1964-1972 GM A-Body G-Body 200 lbs/in

Vehicle Fitment

• 1964-1972 Chevrolet Chevelle / Malibu / El Camino (GM A-Body)
• 1964-1972 Buick Skylark / Gran Sport (GM A-Body)
• 1964-1972 Oldsmobile Cutlass / 442 (GM A-Body)
• 1964-1972 Pontiac GTO / LeMans / Tempest (GM A-Body)
• 1970-1972 Chevrolet Monte Carlo (GM G-Body)
• 1969-1972 Pontiac Grand Prix (GM G-Body)

Fitment Notes

• Bolt-in installation - no cutting or welding required; all necessary mounting brackets and hardware included
• Ride height adjustability: +0.5 inches higher than stock to -2.25 inches lower than stock
• 200 lbs/in spring rate - suited for average-weight A-Body/G-Body builds; contact QA1 tech support at 952.985.5675 for spring rate guidance based on vehicle weight and intended use
• Later model G-Body vehicles tend to weigh more - take this into account when selecting spring rate; alternate spring rates available separately
• Kit fits 1964-1972 GM A-Body and 1969-1972 GM G-Body applications - verify fitment with QA1 if unsure of your specific model year
• Register shocks at QA1 before installation to activate Limited Lifetime Warranty

Features

• Complete bolt-in rear coilover conversion kit - includes specially designed vehicle-specific mounting brackets, 2 double adjustable coilover shocks, 2 high travel springs, and all necessary hardware for a true bolt-in install
• Double adjustable coilovers - 18 independent compression positions x 18 independent rebound positions for 324 total valving combinations
• Fully threaded billet aluminum shock bodies allow continuous ride height adjustment from +0.5 inches above stock to -2.25 inches below stock
• High travel 200 lbs/in springs - fewer coils and smaller wire diameter than standard springs for increased suspension travel, reduced unsprung weight, and faster suspension response
• Mounting brackets are specifically engineered for 1964-1972 GM A-Body/G-Body geometry - no fabrication, no cutting, no welding required
• Lightweight billet aluminum shock body - hard anodized for durability and corrosion resistance
• 100% dyno-tested and serialized for verified, consistent performance
• Serviceable and rebuildable by QA1 Authorized Service Centers
• Made in the USA at QA1's Lakeville, Minnesota facility

Specifications

• Part Number: RCK52358
• Type: Rear Pro Coil Bolt-In Coilover Conversion Kit - Double Adjustable
• Application: 1964-1972 GM A-Body / 1969-1972 GM G-Body
• Shock Type: Double Adjustable Pro Coil Coilover
• Compression Adjustment: 18 positions (independent)
• Rebound Adjustment: 18 positions (independent)
• Total Valving Combinations: 324
• Spring Rate: 200 lbs/in
• Spring Length: 12 inches
• Spring ID: 2.5 inches
• Ride Height Range: +0.5 inches (above stock) to -2.25 inches (below stock)
• Shock Body Material: Billet aluminum, clear anodized
• Internal Design: Twin-tube
• Welding Required: No
• Warranty: Limited Lifetime (register before installation)
• Quantity: Kit (2 shocks, 2 springs, mounting brackets, hardware)
• Made in the USA

Included Components

• 2x Double Adjustable Pro Coil Coilover Shocks - Billet Aluminum, Clear Anodized (100% Dyno-Tested and Serialized)
• 2x High Travel Coilover Springs - 200 lbs/in, 12-inch, 2.5" ID
• 2x Vehicle-Specific Rear Mounting Bracket Sets (upper and lower)
• 1x Complete Hardware Kit (all required mounting hardware)

Product Description

The QA1 RCK52358 is a bolt-in rear Pro Coil coilover conversion kit engineered specifically for 1964-1972 GM A-Body vehicles - including the Chevelle, El Camino, Cutlass 442, GTO, Skylark, and LeMans - as well as 1969-1972 G-Body models including the Monte Carlo and Grand Prix. This double adjustable kit replaces the factory rear shock and spring setup with fully adjustable Pro Coil coilovers, providing independent 18-position compression and rebound damping control (324 total combinations) alongside continuous ride height adjustment from 0.5 inches above stock down to 2.25 inches below stock - all without any cutting, welding, or custom fabrication.

The kit includes vehicle-specific mounting brackets engineered for GM A-Body/G-Body rear geometry, two fully threaded billet aluminum coilover shocks, and two 200 lbs/in high travel springs designed with fewer coils and a smaller wire diameter than standard springs - reducing unsprung weight and increasing suspension travel for superior street and track performance. The 200 lbs/in rate is suited for average-weight A-Body/G-Body builds; alternate spring rates are available separately for heavier vehicles or different ride preferences. Register shocks at QA1 before installation to activate the Limited Lifetime Warranty.