{"product_id":"comp-cams-cl31-600-9-thumpr-227-241hydraulic-roller-evolution-lifter-kit-ford-221-302","title":"COMP Cams CL31-600-9 - Thumpr 227\/241Hydraulic Roller \u0026 Evolution Lifter Kit, Ford 221-302","description":"\u003cp\u003eCOMP Cams CL31-600-9 - Thumpr 227\/241Hydraulic Roller \u0026amp; Evolution Lifter Kit, Ford 221-302\u003c\/p\u003e\u003cp\u003eThumpr 227\/241Hydraulic Roller \u0026amp; Evolution Lifter Kit, Ford 221-302\u003c\/p\u003e\u003cp\u003eThe COMP Cams Thumpr camshafts delivers signature lopey idle, strong low-mid RPM torque, and improved horsepower. Ideal for street\/strip builds looking for aggressive sound, throttle response, and classic muscle performance.\u003c\/p\u003e\u003cp\u003eThe 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 withfull-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 CL31-600-8, delivering proven performance and simplified valvetrain compatibility in one upgraded design.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFeatures full-size base circles, works seamlessly with our Comp Cams Evolution hydraulic roller tappets.\u003c\/li\u003e\n\u003cli\u003eEliminates the need for dog bones and lifter retainers, which were never intended for use in pre-1985 applications.\u003c\/li\u003e\n\u003cli\u003eSupersedes CL31-600-8\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIntake Valve Lift with Factory Rocker Arm Ratio\u003c\/strong\u003e: \u003cspan\u003e0.531\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eLobe Separation\u003c\/strong\u003e: \u003cspan\u003e107\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eExhaust Lobe Lift\u003c\/strong\u003e: \u003cspan\u003e0.322\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIntake Lobe Lift\u003c\/strong\u003e: \u003cspan\u003e0.332\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eExhaust Duration at .050 inch Lift\u003c\/strong\u003e: \u003cspan\u003e241\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIntake Duration .050 Inch Lift\u003c\/strong\u003e: \u003cspan\u003e227\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAdvertised Exhaust Duration\u003c\/strong\u003e: \u003cspan\u003e303\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAdvertised Intake Duration\u003c\/strong\u003e: \u003cspan\u003e283\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIntake Centerline\u003c\/strong\u003e: \u003cspan\u003e102\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eLifters Included\u003c\/strong\u003e: \u003cspan\u003eYes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCam Type\u003c\/strong\u003e: \u003cspan\u003eHydraulic Roller\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEngine Platform\u003c\/strong\u003e: \u003cspan\u003eFord Small Block\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eFuel Management Strategy Compatible\u003c\/strong\u003e: \u003cspan\u003eNo\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eVVT Compatible\u003c\/strong\u003e: \u003cspan\u003eNo\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eDirect Injection\u003c\/strong\u003e: \u003cspan\u003eNo\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eFiring Order\u003c\/strong\u003e: \u003cspan\u003eFS\/FF\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBasic Operating RPM Range\u003c\/strong\u003e: \u003cspan\u003e1900 - 5600\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eExhaust Valve Lash\u003c\/strong\u003e: \u003cspan\u003eHyd\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIntake Valve Lash\u003c\/strong\u003e: \u003cspan\u003eHyd\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eFactory Rocker Ratio\u003c\/strong\u003e: \u003cspan\u003e1.6\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eAdvance\u003c\/strong\u003e: \u003cspan\u003e5\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCross sell \/ Upsell Part Numbers\u003c\/strong\u003e: \u003cspan\u003e89311-16, 1431-16, 431M, 26986-16\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eComputer Controlled Compatible\u003c\/strong\u003e: \u003cspan\u003eNo\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCamshaft Material\u003c\/strong\u003e: \u003cspan\u003eBillet Steel\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eExhaust Valve Lift with Factory Rocker Arm Ratio\u003c\/strong\u003e: \u003cspan\u003e0.515\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eLifter Type\u003c\/strong\u003e: \u003cspan\u003eRoller Tappet\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCamshaft Series\u003c\/strong\u003e: \u003cspan\u003eThumpr\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eValve Springs Required\u003c\/strong\u003e: \u003cspan\u003eYes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"COMP Cams","offers":[{"title":"Default Title","offer_id":49817369378954,"sku":"COMP-CL31-600-9","price":1161.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/0619\/2778\/files\/0_cl31-493-9_cam-and-lifter-kit_v1_original_normalized_aced9b4f-0837-4e3c-a87c-940abb83783b.jpg?v=1785410593","url":"https:\/\/www.onlyinstock.com\/products\/comp-cams-cl31-600-9-thumpr-227-241hydraulic-roller-evolution-lifter-kit-ford-221-302","provider":"Only In Stock","version":"1.0","type":"link"}