{"product_id":"comp-cams-12-601-20-mutha-thumpr-nit-235-249-hydraulic-flat-cam-for-chevrolet-small-block","title":"COMP Cams 12-601-20 Mutha' Thumpr NIT 235\/249 Hydraulic Flat Cam for Chevrolet Small Block","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.\u003ch5\u003eResources\u003c\/h5\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/digital-assets.partshub.com\/BDQQ\/dddbebdc29809.pdf\"\u003eInstallation Instructions\u003c\/a\u003e\u003c\/strong\u003e\u003ch5\u003eResources\u003c\/h5\u003e\u003cstrong\u003e\u003ca href=\"http:\/\/digital-assets.partshub.com\/BDQQ\/2f6b8391c611b.pdf\"\u003eInstallation Instructions\u003c\/a\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003ch5\u003eSpecifications:\u003c\/h5\u003e\u003cbr\u003e\u003ctable class=\"descr-table\" border=\"0\"\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdvertised Exhaust Duration\u003c\/td\u003e\n\u003ctd\u003e305\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdvertised Intake Duration\u003c\/td\u003e\n\u003ctd\u003e287\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmazon ASIN\u003c\/td\u003e\n\u003ctd\u003eB002EDX6R0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly Lubricant Included\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBasic Operating RPM Range\u003c\/td\u003e\n\u003ctd\u003e2,200-6,100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC.A.R.B. E.O. Number\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?\u003c\/td\u003e\n\u003ctd\u003eYes, but must meet tailpipe emission standards for year of vehicle.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?\u003c\/td\u003e\n\u003ctd\u003eYes, but must meet tailpipe emission standards for year of vehicle.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?\u003c\/td\u003e\n\u003ctd\u003eYes, but must meet tailpipe emission standards for year of vehicle.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC.A.R.B. Exempt for On-Road Vehicles?\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC.A.R.B. Exempt for Racing and Off-Road Only Vehicles?\u003c\/td\u003e\n\u003ctd\u003eYes, but must be a race\/competition only vehicle.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eC.A.R.B. Exemption Reason\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalifornia Proposition 65\u003c\/td\u003e\n\u003ctd\u003eWARNING: Cancer and Reproductive Harm P65Warnings.ca.gov\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCam Type\u003c\/td\u003e\n\u003ctd\u003eHydraulic Flat Tappet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamshaft Gear Attachment\u003c\/td\u003e\n\u003ctd\u003e3-Bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamshaft Material\u003c\/td\u003e\n\u003ctd\u003eNitrided Cast Iron\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamshaft Series\u003c\/td\u003e\n\u003ctd\u003eThumpr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDescription_ASM\u003c\/td\u003e\n\u003ctd\u003eFits Chevrolet GEN 1 Small Blocks including the 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400. Does not fit LT1\/LT4, or 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, but 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, LS2, LS3 or any LS-based 4.8, 5.3, 5.7, 6.0 and 6.2. 1955-1957 Chevrolet 265 engines require a groove on the 5th cam journal for oiling. Contact us for more information.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDescription_DEF\u003c\/td\u003e\n\u003ctd\u003eEngine Camshaft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDescription_DES\u003c\/td\u003e\n\u003ctd\u003eMutha' Thumpr NIT 235\/249 Hydraulic Flat Cam for Chevrolet Small Block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDescription_EXT\u003c\/td\u003e\n\u003ctd\u003eHigh performance street\/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle. Nitrided.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDescription_INV\u003c\/td\u003e\n\u003ctd\u003eMThmpr NIT 235\/249 Hyd Flat Cam SBC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDescription_KEY\u003c\/td\u003e\n\u003ctd\u003e265, 283, 307, 302, 305, 327, 350, 383, 400, 427, L46, L48, L65, LM1, LT-1, L82, L81, LS9, L83, L98, L05, LG3, LG4, LT1, LT4, Camaro, Corvette, Chevelle, Stingray, Silverado, C10, Firebird, Chevrolet, Chevy, Small Block Chevy, Caprice, Malibu, Impala, Nova, 355, GEN1, Monte Carlo, S10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDescription_MKT\u003c\/td\u003e\n\u003ctd\u003eDesigned 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.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDescription_SHO\u003c\/td\u003e\n\u003ctd\u003eMT NIT 235\/249HFTSBC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDescription_SHP\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngine Family\u003c\/td\u003e\n\u003ctd\u003eChevrolet 262-400 c.i. 8 Cylinder (1958-1998)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExhaust Duration at .050 inch Lift\u003c\/td\u003e\n\u003ctd\u003e249\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExhaust Valve Lift\u003c\/td\u003e\n\u003ctd\u003e0.476\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrind Number\u003c\/td\u003e\n\u003ctd\u003e287TH7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eheight\u003c\/td\u003e\n\u003ctd\u003e2.6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntake Duration at .050 Inch Lift\u003c\/td\u003e\n\u003ctd\u003e235\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntake Valve Lift\u003c\/td\u003e\n\u003ctd\u003e0.489\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003elength\u003c\/td\u003e\n\u003ctd\u003e24.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLifter Type\u003c\/td\u003e\n\u003ctd\u003eHydraulic Flat Tappet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLifters Included\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLobe Separation\u003c\/td\u003e\n\u003ctd\u003e107\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLTL\u003c\/td\u003e\n\u003ctd\u003eN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTitle\u003c\/td\u003e\n\u003ctd\u003eMutha' Thumpr NIT 235\/249 Hydraulic Flat Cam for Chevrolet Small Block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsage\u003c\/td\u003e\n\u003ctd\u003eStreet\/Strip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Springs Required\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eweight\u003c\/td\u003e\n\u003ctd\u003e9.171\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ewidth\u003c\/td\u003e\n\u003ctd\u003e3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"COMP Cams","offers":[{"title":"Default Title","offer_id":41083370012853,"sku":"ds_BDQQ_12-601-20","price":615.86,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0283\/1905\/5956\/products\/3f623baf77ee4.jpg?v=1634625482","url":"https:\/\/www.truckpartsuperstore.ca\/products\/comp-cams-12-601-20-mutha-thumpr-nit-235-249-hydraulic-flat-cam-for-chevrolet-small-block","provider":"Truck Part Superstore","version":"1.0","type":"link"}