12-602-8 Big Mutha' Thumpr 243/257 Hydraulic Roller Cam for Chevrolet Small Block

Application Summary: Fits 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. Key Search Words: 265, 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 Market Description: WARNING: Camshaft Optimized for use with a Melanized or Nitrided distributor Gear. Not compatible with cast or Steel Gears without similar surface treatments. Failure to utilize the proper distributor Gear will void all warranties and/or return policies. Product Description - Extended: Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle. Product Description - Long: Big Mutha' Thumpr 243/257 Hydraulic Roller Cam for Chevrolet Small Block Product Description - Invoice: Big M-Thumpr 243/257 Hyd Roller Cam SBC Product Description - Short: COMP Cams Camshaft CS 299T HR-107 BMT T Label Description: CAMSHAFT, CS 299T HR-107 BMT T HUMPR Product Description - Short: BMT 243/257 HRlr SBC AAIA Part Type Description: Engine Camshaft Shipping Restrictions: None