Comp Cams Nitrided Mutha' Thumpr ; Hyd. Flat Tappet; '58-'98 Chevy Small Roof Racks Black Hard Anodized for Corrosion

Black Hard Anodized for Corrosion Resistance

Direct Bolt-On Fitment: Bolts to factory mounting points with basic hand tools

OEM-spec signal accuracy - Maintains proper ABS function without fault codes

255" ID with 3/16" Keyway

For screw installation – professional fitting is recommended to ensure correct positioning and a clean finish

Comp Cams Nitrided Mutha' Thumpr ; Hyd. Flat Tappet; '58-'98 Chevy Small Roof Racks Black Hard Anodized for CorrosionHydraulic Flat Tappet; For '58 '98 262 400 cid Small Block Engines w Flat Tappet Cam High Performance Street Strip Needs 9: 1 Compression, 2500+ Stall, Intake, Gears & Headers Rough Idle Vehicle Fitments: Year Make Model Submodel 1995 1996 AM General Hummer Base 1980 1991 Avanti II Base 1985 Avanti II GT 1980 1981 Buick Century Base, Estate, Sport, Limited 1991 1996 Buick Commercial Chassis Base 1989 Buick Electra Park Avenue Ultra 1980 1989 Buick