{"product_id":"qa1-gm-pro-front-coil-over-system-single-adj-9in-x-450lbs-in-pigtail-large-aluminum","title":"QA1 GS507-09450D Front Pro Coil Single Adj Coilover 1963-1982 Corvette 1958-1970","description":"\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\u003cul\u003e \u003cli\u003e1963-1967 Chevrolet Corvette C2 (Sting Ray)\u003c\/li\u003e \u003cli\u003e1968-1982 Chevrolet Corvette C3 (Stingray \/ Corvette)\u003c\/li\u003e \u003cli\u003e1958-1970 Chevrolet Impala, Bel Air, Caprice (Full-Size GM - Style D spring perch)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment Notes\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eStyle D spring - 9-inch tapered with large diameter pigtail upper end - specific to 1963-1982 Corvette and 1958-1970 full-size Chevy spring perch geometry; this is a different spring style than the Style C (flat large upper) used on 1971+ full-size GM vehicles\u003c\/li\u003e \u003cli\u003e450 lbs\/in spring rate is the small block engine recommendation; for big block applications see the 550 lbs\/in kit (GS507-09550D)\u003c\/li\u003e \u003cli\u003eBolt-in compatible with both factory OE stamped steel control arms and QA1 tubular control arms - no control arm replacement required\u003c\/li\u003e \u003cli\u003eUpper mount: Stud type \/ Lower mount: T-bar type\u003c\/li\u003e \u003cli\u003eSome applications may require the lower A-arm to be dropped for installation; shock body diameter may require enlarging the lower control arm shock opening\u003c\/li\u003e \u003cli\u003eProvides 0 to -2 inches of front ride height adjustability\u003c\/li\u003e \u003cli\u003eSpanner wrench and thrust bearing not included - sold separately (QA1 7888-109 \/ 7888-110)\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\u003eSingle adjustable GS507 Pro Coil shock - 18 valving positions of simultaneous compression and rebound adjustment for easy on-car tuning\u003c\/li\u003e \u003cli\u003eProvides 0 to -2 inches of front ride height adjustability via threaded shock body spring seat nut\u003c\/li\u003e \u003cli\u003eIncludes a 9-inch tapered Style D high travel chrome silicon spring at 450 lbs\/in - large diameter pigtail upper end specific to Corvette C2\/C3 and 1958-1970 full-size Chevy spring perch geometry\u003c\/li\u003e \u003cli\u003eFewer coils and smaller wire diameter vs. conventional springs for increased travel and reduced unsprung weight\u003c\/li\u003e \u003cli\u003eBolt-in with both factory OE and QA1 tubular control arms for maximum build flexibility\u003c\/li\u003e \u003cli\u003eStud upper \/ T-bar lower mount configuration for stock-style front suspension integration\u003c\/li\u003e \u003cli\u003eSuitable for street performance, autocross, road racing, drag racing, and street rod applications\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: GS507-09450D\u003c\/li\u003e \u003cli\u003eType: Front Pro Coil Single Adjustable Coilover System\u003c\/li\u003e \u003cli\u003eApplication: 1963-1982 Chevrolet Corvette (C2\/C3); 1958-1970 Chevrolet Impala, Bel Air, Caprice (Full-Size)\u003c\/li\u003e \u003cli\u003eShock Model: GS507 Single Adjustable Pro Coil\u003c\/li\u003e \u003cli\u003eThreaded Adjustment Range: 3 inches\u003c\/li\u003e \u003cli\u003eValving: 18 positions (simultaneous compression and rebound)\u003c\/li\u003e \u003cli\u003eSpring Length: 9 inches (tapered, Style D - large diameter pigtail upper end)\u003c\/li\u003e \u003cli\u003eSpring Rate: 450 lbs\/in\u003c\/li\u003e \u003cli\u003eSpring Material: Chrome Silicon High Travel\u003c\/li\u003e \u003cli\u003eRide Height Adjustability: 0 to -2 inches\u003c\/li\u003e \u003cli\u003eUpper Mount: Stud Type\u003c\/li\u003e \u003cli\u003eLower Mount: T-Bar Type\u003c\/li\u003e \u003cli\u003eWarranty: Limited Lifetime (register before installation)\u003c\/li\u003e \u003cli\u003eQuantity: Pair (2 shocks + 2 springs)\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 QA1 GS507 Single Adjustable Pro Coil Front Shocks (100% Dyno-Tested and Serialized)\u003c\/li\u003e \u003cli\u003e2x 9-Inch Tapered Style D High Travel Chrome Silicon Springs - 450 lbs\/in (large diameter pigtail upper)\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 GS507-09450D is a single adjustable front Pro Coil coilover system engineered as a bolt-in front suspension upgrade for 1963-1982 Chevrolet Corvettes (C2 and C3) and 1958-1970 Chevrolet full-size vehicles including the Impala, Bel Air, and Caprice. This kit uses the Style D spring - a 9-inch tapered spring with a large diameter pigtail upper end - which is specific to the Corvette C2\/C3 and 1958-1970 full-size Chevy spring perch geometry, and is distinct from the Style C flat large upper spring used on 1971+ full-size GM vehicles. The 450 lbs\/in rate is the small block engine recommendation for this application.\u003c\/p\u003e\u003cp\u003eThe GS507 single adjustable shock offers an 18-position valve dial that adjusts compression and rebound simultaneously, accessible by turning the steering wheel to full lock. This kit provides up to 2 inches of ride height drop via the threaded shock body spring seat and installs with both factory OE stamped steel control arms and QA1 tubular control arms. Note that a spanner wrench and thrust bearing are sold separately. Each shock is 100% dyno-tested, serialized, and serviceable by QA1 Authorized Service Centers. Register at QA1 before installation to activate the Limited Lifetime Warranty.\u003c\/p\u003e","brand":"QA1","offers":[{"title":"Default Title","offer_id":53499715256639,"sku":"QAPGS507-09450D","price":789.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/7308\/9343\/files\/5ca8728ba07ffc3666bc60fb881e98dd_0ce0442f-3214-44b4-8383-a0e68ee051d0.jpg?v=1780440348","url":"https:\/\/wcaperformance.com\/products\/qa1-gm-pro-front-coil-over-system-single-adj-9in-x-450lbs-in-pigtail-large-aluminum","provider":"WCA Performance","version":"1.0","type":"link"}