{"product_id":"qa1-64-72-gm-a-g-body-pro-rear-coil-over-system-double-adj-12in-x-200lbs-in-aluminum","title":"QA1 RCK52358 Rear Pro Coil Kit Double Adj 1964-1972 GM A-Body G-Body 200 lbs\/in","description":"\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\u003cul\u003e \u003cli\u003e1964-1972 Chevrolet Chevelle \/ Malibu \/ El Camino (GM A-Body)\u003c\/li\u003e \u003cli\u003e1964-1972 Buick Skylark \/ Gran Sport (GM A-Body)\u003c\/li\u003e \u003cli\u003e1964-1972 Oldsmobile Cutlass \/ 442 (GM A-Body)\u003c\/li\u003e \u003cli\u003e1964-1972 Pontiac GTO \/ LeMans \/ Tempest (GM A-Body)\u003c\/li\u003e \u003cli\u003e1970-1972 Chevrolet Monte Carlo (GM G-Body)\u003c\/li\u003e \u003cli\u003e1969-1972 Pontiac Grand Prix (GM G-Body)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment Notes\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eBolt-in installation - no cutting or welding required; all necessary mounting brackets and hardware included\u003c\/li\u003e \u003cli\u003eRide height adjustability: +0.5 inches higher than stock to -2.25 inches lower than stock\u003c\/li\u003e \u003cli\u003e200 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\u003c\/li\u003e \u003cli\u003eLater model G-Body vehicles tend to weigh more - take this into account when selecting spring rate; alternate spring rates available separately\u003c\/li\u003e \u003cli\u003eKit fits 1964-1972 GM A-Body and 1969-1972 GM G-Body applications - verify fitment with QA1 if unsure of your specific model year\u003c\/li\u003e \u003cli\u003eRegister shocks at QA1 before installation to activate Limited Lifetime Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFeatures\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eComplete 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\u003c\/li\u003e \u003cli\u003eDouble adjustable coilovers - 18 independent compression positions x 18 independent rebound positions for 324 total valving combinations\u003c\/li\u003e \u003cli\u003eFully threaded billet aluminum shock bodies allow continuous ride height adjustment from +0.5 inches above stock to -2.25 inches below stock\u003c\/li\u003e \u003cli\u003eHigh 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\u003c\/li\u003e \u003cli\u003eMounting brackets are specifically engineered for 1964-1972 GM A-Body\/G-Body geometry - no fabrication, no cutting, no welding required\u003c\/li\u003e \u003cli\u003eLightweight billet aluminum shock body - hard anodized for durability and corrosion resistance\u003c\/li\u003e \u003cli\u003e100% dyno-tested and serialized for verified, consistent performance\u003c\/li\u003e \u003cli\u003eServiceable and rebuildable by QA1 Authorized Service Centers\u003c\/li\u003e \u003cli\u003eMade in the USA at QA1's Lakeville, Minnesota facility\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e \u003cli\u003ePart Number: RCK52358\u003c\/li\u003e \u003cli\u003eType: Rear Pro Coil Bolt-In Coilover Conversion Kit - Double Adjustable\u003c\/li\u003e \u003cli\u003eApplication: 1964-1972 GM A-Body \/ 1969-1972 GM G-Body\u003c\/li\u003e \u003cli\u003eShock Type: Double Adjustable Pro Coil Coilover\u003c\/li\u003e \u003cli\u003eCompression Adjustment: 18 positions (independent)\u003c\/li\u003e \u003cli\u003eRebound Adjustment: 18 positions (independent)\u003c\/li\u003e \u003cli\u003eTotal Valving Combinations: 324\u003c\/li\u003e \u003cli\u003eSpring Rate: 200 lbs\/in\u003c\/li\u003e \u003cli\u003eSpring Length: 12 inches\u003c\/li\u003e \u003cli\u003eSpring ID: 2.5 inches\u003c\/li\u003e \u003cli\u003eRide Height Range: +0.5 inches (above stock) to -2.25 inches (below stock)\u003c\/li\u003e \u003cli\u003eShock Body Material: Billet aluminum, clear anodized\u003c\/li\u003e \u003cli\u003eInternal Design: Twin-tube\u003c\/li\u003e \u003cli\u003eWelding Required: No\u003c\/li\u003e \u003cli\u003eWarranty: Limited Lifetime (register before installation)\u003c\/li\u003e \u003cli\u003eQuantity: Kit (2 shocks, 2 springs, mounting brackets, hardware)\u003c\/li\u003e \u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eIncluded Components\u003c\/h4\u003e\u003cul\u003e \u003cli\u003e2x Double Adjustable Pro Coil Coilover Shocks - Billet Aluminum, Clear Anodized (100% Dyno-Tested and Serialized)\u003c\/li\u003e \u003cli\u003e2x High Travel Coilover Springs - 200 lbs\/in, 12-inch, 2.5\" ID\u003c\/li\u003e \u003cli\u003e2x Vehicle-Specific Rear Mounting Bracket Sets (upper and lower)\u003c\/li\u003e \u003cli\u003e1x Complete Hardware Kit (all required mounting hardware)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Description\u003c\/h4\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003cp\u003eThe 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.\u003c\/p\u003e","brand":"QA1","offers":[{"title":"Default Title","offer_id":53499717714239,"sku":"QAPRCK52358","price":1109.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/7308\/9343\/files\/98900f43c159c37edc2563680d7cacb3_d9f4cbb4-b87b-4cf2-8cd2-dcd5d4ec0a27.jpg?v=1780440366","url":"https:\/\/wcaperformance.com\/products\/qa1-64-72-gm-a-g-body-pro-rear-coil-over-system-double-adj-12in-x-200lbs-in-aluminum","provider":"WCA Performance","version":"1.0","type":"link"}