{"product_id":"mutha-thumpr-235-249-hydraulic-roller-ford-221-302","title":"Mutha' Thumpr 235\/249 Hydraulic Roller  Ford 221-302","description":"The COMP Cams Thumpr camshaft delivers a signature lopey idle, strong low- to mid-RPM torque, and improved horsepower, making it ideal for street\/strip builds seeking aggressive sound, throttle response, and classic muscle performance. Designed for high-performance street applications, it provides an unmistakable idle quality while pairing exceptionally well with popular upgrades like the Edelbrock RPM Air Gap intake manifold and TCI Saturday Night Special torque converter. Built with full-size base circles for added durability, this cam works seamlessly with COMP Cams Evolution hydraulic roller tappets and eliminates the need for dog bones and lifter retainers—components never intended for pre-1985 applications. This camshaft supersedes part number 31-600-8, delivering proven performance and simplified valvetrain compatibility in one upgraded design.\r\n\u003cul\u003e\t\u003cli\u003eFeatures full-size base circles, works seamlessly with our Comp Cams Evolution hydraulic roller tappets.\u003c\/li\u003e\r\n\t\u003cli\u003eEliminates the need for dog bones and lifter retainers, which were never intended for use in pre-1985 applications.\u003c\/li\u003e\r\n\t\u003cli\u003eSupersedes 31-601-8\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\t\t\t\t\u003cdiv class=\"product__accordion accordion\"\u003e\n\t\t\t\t\u003cdetails\u003e\n\t\t\t\t  \u003csummary aria-expanded=\"false\"\u003e\n\t\t\t\t\t\u003cdiv class=\"summary__title\"\u003e\u003ch2 class=\"h4 accordion__title\"\u003eAttributes\u003c\/h2\u003e\u003c\/div\u003e\n\u003cspan class=\"icon-caret\"\u003e\u003c\/span\u003e\t\t\t\t\t\n\t\t\t\t  \u003c\/summary\u003e\n\t\t\t\t  \u003cdiv class=\"accordion__content\"\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\u003e00036584003564\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eAdvance: \u003c\/b\u003e5\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\u003eBasic Operating RPM Range: \u003c\/b\u003e2200 - 5900\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCam Type: \u003c\/b\u003eHydraulic Roller\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCamshaft Series: \u003c\/b\u003eThumpr\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eComputer Controlled Compatible: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eCross sell \/ Upsell Part Numbers: \u003c\/b\u003e89311-16, 1431-16, 431M, 26986-16\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eDirect Injection: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eEngine Platform: \u003c\/b\u003eFord Small Block\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 Lobe Lift: \u003c\/b\u003e0.329\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Valve Lash: \u003c\/b\u003eHyd\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eExhaust Valve Lift with Factory Rocker Arm Ratio: \u003c\/b\u003e0.526\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eFactory Rocker Ratio: \u003c\/b\u003e1.6\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eFiring Order: \u003c\/b\u003eFS\/FF\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eFuel Management Strategy Compatible: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Centerline: \u003c\/b\u003e102\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 Lobe Lift: \u003c\/b\u003e0.338\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Valve Lash: \u003c\/b\u003eHyd\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eIntake Valve Lift with Factory Rocker Arm Ratio: \u003c\/b\u003e0.541\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eLifter Type: \u003c\/b\u003eRoller Tappet\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eLobe Separation: \u003c\/b\u003e107\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eMaterial: \u003c\/b\u003eBillet Steel\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eVVT Compatible: \u003c\/b\u003eNo\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eValve Springs Required: \u003c\/b\u003eYes\u003c\/li\u003e\r\n\u003c\/ul\u003e\u003c\/div\u003e\n\t\t\t\t\u003c\/details\u003e\n\t\t\t\t\u003c\/div\u003e\r\n\t\t\t\t\u003cdiv class=\"product__accordion accordion\"\u003e\n\t\t\t\t\u003cdetails\u003e\n\t\t\t\t  \u003csummary aria-expanded=\"false\"\u003e\n\t\t\t\t\t\u003cdiv class=\"summary__title\"\u003e\u003ch2 class=\"h4 accordion__title\"\u003eExtended Information\u003c\/h2\u003e\u003c\/div\u003e\n\u003cspan class=\"icon-caret\"\u003e\u003c\/span\u003e\t\t\t\t\t\n\t\t\t\t  \u003c\/summary\u003e\n\t\t\t\t  \u003cdiv class=\"accordion__content\"\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\u003eRacing or Pre-Emissions Use Only\u003c\/li\u003e\r\n\u003c\/ul\u003e\u003c\/div\u003e\n\t\t\t\t\u003c\/details\u003e\n\t\t\t\t\u003c\/div\u003e\r\n\t\t\t\t\u003cdiv class=\"product__accordion accordion\"\u003e\n\t\t\t\t\u003cdetails\u003e\n\t\t\t\t  \u003csummary aria-expanded=\"false\"\u003e\n\t\t\t\t\t\u003cdiv class=\"summary__title\"\u003e\u003ch2 class=\"h4 accordion__title\"\u003ePacking Information\u003c\/h2\u003e\u003c\/div\u003e\n\u003cspan class=\"icon-caret\"\u003e\u003c\/span\u003e\t\t\t\t\t\n\t\t\t\t  \u003c\/summary\u003e\n\t\t\t\t  \u003cdiv class=\"accordion__content\"\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\u003e24.3 x 2.9 x 2.7 inches\u003c\/li\u003e\r\n\u003cli\u003e\n\u003cb\u003eWeight: \u003c\/b\u003e10.95 POUNDS\u003c\/li\u003e\r\n\u003c\/ul\u003e\u003c\/div\u003e\n\t\t\t\t\u003c\/details\u003e\n\t\t\t\t\u003c\/div\u003e\r\n\t\t\t\t\u003cdiv class=\"product__accordion accordion\"\u003e\n\t\t\t\t\u003cdetails\u003e\n\t\t\t\t  \u003csummary aria-expanded=\"false\"\u003e\n\t\t\t\t\t\u003cdiv class=\"summary__title\"\u003e\u003ch2 class=\"h4 accordion__title\"\u003ePDF\u003c\/h2\u003e\u003c\/div\u003e\n\u003cspan class=\"icon-caret\"\u003e\u003c\/span\u003e\t\t\t\t\t\n\t\t\t\t  \u003c\/summary\u003e\n\t\t\t\t  \u003cdiv class=\"accordion__content\"\u003e\r\n\u003cdiv\u003e\u003ca href=\"https:\/\/sdda.semadata.org\/Standard\/Edelbrock\/145.pdf\" target=\"_blank\"\u003e\u003cimg 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style=\"display:inline\"\u003e \u003c\/a\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\t\t\t\t\u003c\/details\u003e\n\t\t\t\t\u003c\/div\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":63472681058444,"sku":"BDQQ-31-601-9","price":562.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0279\/3848\/8460\/files\/31-493-9_Camshaft_V1_379214ab-2077-42ef-9491-de57165b1f50.jpg?v=1792814447","url":"https:\/\/sema-search.myshopify.com\/products\/mutha-thumpr-235-249-hydraulic-roller-ford-221-302","provider":"SEMA search","version":"1.0","type":"link"}