{"product_id":"big-mutha-thumpr-243-257-hydraulic-flat-cam-gk-kit-for-chevrolet-small-block","title":"Big Mutha' Thumpr 243\/257 Hydraulic Flat Cam GK-Kit For Chevrolet Small Block","description":"Big Mutha' Thumpr 243\/257 Hydraulic Flat Cam GK-Kit for Chevrolet Small Block 262-400. Street\/strip, needs 9.5:1 compression, 2800+ stall, intake, Gears and headers, very rough idle.\r\n\u003cb\u003eVehicle Specific\u003c\/b\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eFits Chevrolet GEN 1 Small Blocks including the 262\u003c\/li\u003e\r\n\u003cli\u003eor factory roller Small Blocks built from 1985 and newer. GM gradually added roller camshafts to 305's and 350's from the mid 80's forward. Camaros\/Firebirds\/Corvettes received the roller cams early\u003c\/li\u003e\r\n\u003cli\u003ebut many trucks and SUV's had flat tappet cams until the mid 90's. Remove the intake or timing cover to confirm whether the block is a factory roller or flat tappet. Does not fit the LS1\u003c\/li\u003e\r\n\u003cli\u003eLS2\u003c\/li\u003e\r\n\u003cli\u003eLS3 or any LS-based 4. 8\u003c\/li\u003e\r\n\u003cli\u003e5. 3\u003c\/li\u003e\r\n\u003cli\u003e5. 7\u003c\/li\u003e\r\n\u003cli\u003e6. 0 and 6. 2. 1955-1957 Chevrolet 265 engines require a groove on the 5th cam journal for oiling. Contact us for more information.\u003c\/li\u003e\r\n\u003cli\u003e265\u003c\/li\u003e\r\n\u003cli\u003e267\u003c\/li\u003e\r\n\u003cli\u003e283\u003c\/li\u003e\r\n\u003cli\u003e302\u003c\/li\u003e\r\n\u003cli\u003e305\u003c\/li\u003e\r\n\u003cli\u003e307\u003c\/li\u003e\r\n\u003cli\u003e327\u003c\/li\u003e\r\n\u003cli\u003e350 and 400. Does not fit LT1\/LT4\u003c\/li\u003e\r\n\r\n\u003c\/ul\u003e\r\n\u003ch3\u003eAttributes:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eBrand Name: \u003c\/b\u003eCOMP Cams\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eGTIN: \u003c\/b\u003e00036584183235\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eAdvertised Exhaust Duration: \u003c\/b\u003e313\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eAdvertised Intake Duration: \u003c\/b\u003e295\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eAmazon ASIN: \u003c\/b\u003eB002EE77D8\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eBasic Operating RPM Range: \u003c\/b\u003e2,500-6,400\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eC.A.R.B. E.O. Number: \u003c\/b\u003eN\/A\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eC.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?: \u003c\/b\u003eYes, but must meet tailpipe emission standards for year of vehicle.\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eC.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?: \u003c\/b\u003eYes, but must meet tailpipe emission standards for year of vehicle.\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eC.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?: \u003c\/b\u003eYes, but must meet tailpipe emission standards for year of vehicle.\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eC.A.R.B. Exempt for On-Road Vehicles?: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eC.A.R.B. Exempt for Racing and Off-Road Only Vehicles?: \u003c\/b\u003eYes, but must be a race\/competition only vehicle.\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eC.A.R.B. Exemption Reason: \u003c\/b\u003eN\/A\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCam Type: \u003c\/b\u003eHydraulic Flat Tappet\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCamshaft Series: \u003c\/b\u003eThumpr\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eEngine Family: \u003c\/b\u003eChevrolet 262-400 c.i. 8 Cylinder (1958-1998)\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Duration at .050 inch Lift: \u003c\/b\u003e257\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Valve Lift: \u003c\/b\u003e0.486\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eGaskets Included: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Duration at .050 Inch Lift: \u003c\/b\u003e243\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Valve Lift: \u003c\/b\u003e0.5\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eK-Kit Upgrade: \u003c\/b\u003eK12-602-4\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eKit Type: \u003c\/b\u003eGK-Kit - Cam and Gear Kit\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eLifter Type: \u003c\/b\u003eHydraulic Flat Tappet\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eLifters Included: \u003c\/b\u003eYes\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eLocks Included: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003ePushrods Included: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eRetainers Included: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eTiming Chain and Gears Included: \u003c\/b\u003eYes\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eUsage: \u003c\/b\u003eStreet\/Strip\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Stem Seals Included: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch3\u003eExtended Information:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eCountry of Origin: \u003c\/b\u003eUnited States\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eEmissions : \u003c\/b\u003eEPA Eligible\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003ch3\u003ePacking Information:\u003c\/h3\u003e\r\n\u003cp\u003e\u003c\/p\u003e\u003cul\u003e\r\n\u003cli\u003e\n\u003cb\u003eQuantity of Each: \u003c\/b\u003e1\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003ePackage UOM: \u003c\/b\u003eKT\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eDimension: \u003c\/b\u003e26 x 10.5 x 5 inches\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eWeight: \u003c\/b\u003e19 POUNDS\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\r\n\u003cdiv id=\"sema-product-fitment\" class=\"product__accordion accordion fitment\"\u003e\u003c\/div\u003e","brand":"COMP Cams","offers":[{"title":"Default Title","offer_id":44632581767213,"sku":"BDQQ-GK12-602-4","price":1259.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/2780\/2157\/files\/GK12-602-4.jpg?v=1771764728","url":"https:\/\/montgomeryparts.com\/products\/big-mutha-thumpr-243-257-hydraulic-flat-cam-gk-kit-for-chevrolet-small-block","provider":"Montgomery Parts","version":"1.0","type":"link"}