{"product_id":"umi-performance-factory-height-rear-springs-64-66-gm-a-body-gphp-4048r","title":"UMI Performance Factory Height Rear Springs — 1964-1966 GM A-Body | 9254 CrSi, 130 lb\/in | 4048R","description":"\u003cp\u003eUMI Performance manufactures its own line of springs, developed in conjunction with a leading Sprint Cup chassis engineer. These factory-height rear springs add modern handling and a crisp ride while keeping the stock muscle car appearance. They are wound from 9254 chromium-silicon premium wire with a linear 130 lb\/in rate that provides consistent handling for autocross and Pro-Touring use as well as corner carving and general cruising, while the added stiffness reduces body roll and the floating feeling common to the A-body. They carry a tough black powder coat finish and UMI proudly manufactures these springs in the USA.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFactory (stock) height rear coil springs\u003c\/li\u003e\n\u003cli\u003eSold as a pair\u003c\/li\u003e\n\u003cli\u003e9254 chromium-silicon premium wire\u003c\/li\u003e\n\u003cli\u003eLinear 130 lb\/in spring rate\u003c\/li\u003e\n\u003cli\u003eBlack powder coat finish\u003c\/li\u003e\n\u003cli\u003eFits 1964-1966 GM A-body\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003ePart number: 4048R\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eVehicle Applications:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e1964 Buick Skylark\u003c\/li\u003e\n\u003cli\u003e1965 Buick Skylark\u003c\/li\u003e\n\u003cli\u003e1966 Buick Skylark\u003c\/li\u003e\n\u003cli\u003e1964 Buick Special\u003c\/li\u003e\n\u003cli\u003e1965 Buick Special\u003c\/li\u003e\n\u003cli\u003e1966 Buick Special\u003c\/li\u003e\n\u003cli\u003e1964 Chevrolet Chevelle\u003c\/li\u003e\n\u003cli\u003e1965 Chevrolet Chevelle\u003c\/li\u003e\n\u003cli\u003e1966 Chevrolet Chevelle\u003c\/li\u003e\n\u003cli\u003e1964 Chevrolet El Camino\u003c\/li\u003e\n\u003cli\u003e1965 Chevrolet El Camino\u003c\/li\u003e\n\u003cli\u003e1966 Chevrolet El Camino\u003c\/li\u003e\n\u003cli\u003e1964 Oldsmobile 442\u003c\/li\u003e\n\u003cli\u003e1965 Oldsmobile 442\u003c\/li\u003e\n\u003cli\u003e1966 Oldsmobile 442\u003c\/li\u003e\n\u003cli\u003e1964 Oldsmobile Cutlass\u003c\/li\u003e\n\u003cli\u003e1965 Oldsmobile Cutlass\u003c\/li\u003e\n\u003cli\u003e1966 Oldsmobile Cutlass\u003c\/li\u003e\n\u003cli\u003e1964 Oldsmobile F85\u003c\/li\u003e\n\u003cli\u003e1965 Oldsmobile F85\u003c\/li\u003e\n\u003cli\u003e1966 Oldsmobile F85\u003c\/li\u003e\n\u003cli\u003e1964 Pontiac GTO\u003c\/li\u003e\n\u003cli\u003e1965 Pontiac GTO\u003c\/li\u003e\n\u003cli\u003e1966 Pontiac GTO\u003c\/li\u003e\n\u003cli\u003e1964 Pontiac LeMans\u003c\/li\u003e\n\u003cli\u003e1965 Pontiac LeMans\u003c\/li\u003e\n\u003cli\u003e1966 Pontiac LeMans\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003ch5\u003eWhat vehicles do the UMI 4048R rear springs fit?\u003c\/h5\u003e\u003cp\u003eThey fit 1964-1966 GM A-body cars, including the Chevrolet Chevelle and El Camino, Pontiac GTO and LeMans, Oldsmobile 442 and Cutlass, and Buick Skylark and Special. See the vehicle applications list for every year and model.\u003c\/p\u003e\u003ch5\u003eWhat is the spring rate?\u003c\/h5\u003e\u003cp\u003eThe rear springs are wound from 9254 chromium-silicon premium wire and use a linear 130 lb\/in rate for consistent handling.\u003c\/p\u003e\u003ch5\u003eWill these keep a factory ride height?\u003c\/h5\u003e\u003cp\u003eYes. These are factory-height springs engineered to keep the stock muscle car appearance while adding modern handling and a crisp ride.\u003c\/p\u003e\u003ch5\u003eWhat are they good for?\u003c\/h5\u003e\u003cp\u003eThe linear rate suits autocross and Pro-Touring driving as well as corner carving and general cruising, and the added stiffness reduces body roll and the floating feeling common to the A-body.\u003c\/p\u003e\u003ch5\u003eAre these springs made in the USA?\u003c\/h5\u003e\u003cp\u003eYes. UMI Performance manufactures these springs in the USA.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What vehicles do the UMI 4048R rear springs fit?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"They fit 1964-1966 GM A-body cars, including the Chevrolet Chevelle and El Camino, Pontiac GTO and LeMans, Oldsmobile 442 and Cutlass, and Buick Skylark and Special. See the vehicle applications list for every year and model.\"}}, {\"@type\": \"Question\", \"name\": \"What is the spring rate?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The rear springs are wound from 9254 chromium-silicon premium wire and use a linear 130 lb\/in rate for consistent handling.\"}}, {\"@type\": \"Question\", \"name\": \"Will these keep a factory ride height?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. These are factory-height springs engineered to keep the stock muscle car appearance while adding modern handling and a crisp ride.\"}}, {\"@type\": \"Question\", \"name\": \"What are they good for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The linear rate suits autocross and Pro-Touring driving as well as corner carving and general cruising, and the added stiffness reduces body roll and the floating feeling common to the A-body.\"}}, {\"@type\": \"Question\", \"name\": \"Are these springs made in the USA?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. UMI Performance manufactures these springs in the USA.\"}}]}\u003c\/script\u003e","brand":"UMI Performance","offers":[{"title":"Default Title","offer_id":42635600035888,"sku":"GPHP_4048R","price":189.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0586\/9548\/3440\/files\/UMI4048R.jpg?v=1765286531","url":"https:\/\/berryperformancesales.com\/products\/umi-performance-factory-height-rear-springs-64-66-gm-a-body-gphp-4048r","provider":"Berry Performance Sales","version":"1.0","type":"link"}