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.
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
Recommended in highly modified 420+ c.i. stroker applications with higher compression. 3500+ Stall.
COMP Cams 4-Pattern Small Base Circle 311QS10 Hydraulic Roller Camshaft for Small Block Chevy
4-Pattern 258/268 IB, 260/270 OB Hydraulic Roller Cam for Chevrolet Small Block
COMP Cams Camshaft CS 311Qs10 .900 Base
CamShaft, CS 311QS10 .900 Base Circle
4-Pattern 258/268 IB H-Roller Cam SBC
4Pt 258/268 HRlr SBC
Engine Camshaft
None