{"product_id":"mutha-thumpr-235-249-hydraulic-roller-cam-for-oe-roller-sbc","title":"Mutha' Thumpr 235\/249 Hydraulic Roller Cam For OE Roller SBC","description":"Designed to deliver an aggressive, hard-hitting exhaust note at idle, the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods, the Thumpr series' early intake valve opening and long exhaust duration create optimum overlap for that race car idle. The Thumpr grinds all require an aftermarket torque converter and lower gear ratio to ensure the drivetrain always puts the engine in its powerband. Additionally, Thumpr camshafts typically deliver reduced vacuum at idle, making a vacuum canister, pump or hydroboost a requirement for vehicles running power brakes.\r\n\u003cb\u003eVehicle Specific\u003c\/b\u003e\r\n\u003cul\u003e\r\n\u003cli\u003eFits '87+ GEN 1 Chevrolet 305-350 Small Blocks w\/ Factory Roller Camshafts (Not LT-1\/LS1 etc)\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\u003e00036584171980\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eAdvertised Exhaust Duration: \u003c\/b\u003e311\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eAdvertised Intake Duration: \u003c\/b\u003e291\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eAmazon ASIN: \u003c\/b\u003eB002EDZVUU\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eAssembly Lubricant Included: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eBasic Operating RPM Range: \u003c\/b\u003e1,900-5,600\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  Lifter and Gear Drive Upgrade: \u003c\/b\u003eGK08-601-8\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCam Type: \u003c\/b\u003eHydraulic Roller\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCam and Lifter Kit Upgrade: \u003c\/b\u003eCL08-601-8\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCamshaft Gear Attachment: \u003c\/b\u003e3-Bolt\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCamshaft Material: \u003c\/b\u003eAustempered Ductile Iron\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 305-350 c.i. 8 Cylinder O.E. Roller (1987-1998)\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Duration at .050 inch Lift: \u003c\/b\u003e249\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Valve Lift: \u003c\/b\u003e0.509\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eGrind Number: \u003c\/b\u003e291THR7\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Duration at .050 Inch Lift: \u003c\/b\u003e235\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Valve Lift: \u003c\/b\u003e0.522\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eK-Kit Upgrade: \u003c\/b\u003eK08-601-8\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eLifter Type: \u003c\/b\u003eHydraulic Roller\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eLifters Included: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eLobe Separation: \u003c\/b\u003e107\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eUsage: \u003c\/b\u003eStreet\/Strip\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Springs Required: \u003c\/b\u003eYes\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\u003eUS\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\u003eEA\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eDimension: \u003c\/b\u003e23.22 x 2.83 x 2.59 inches\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eWeight: \u003c\/b\u003e8.65 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":44705789837357,"sku":"BDQQ-08-601-8","price":1099.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0646\/2780\/2157\/files\/08-601-8.jpg?v=1773328362","url":"https:\/\/montgomeryparts.com\/products\/mutha-thumpr-235-249-hydraulic-roller-cam-for-oe-roller-sbc","provider":"Montgomery Parts","version":"1.0","type":"link"}