These COMP Cams rocker arm shaft spacers are designed to allow the engine to rev higher and reduce the possibility of parts breakage. They are used on engines with adjustable rocker arms to improve valve tip alignment.

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COMP Cams Rocker Arm, Ultra Pro Magnum, Full Roller, Chromoly Steel, 1.8 Ratio, GM LS3 3/8 in. Stud, Set of 16

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COMP Cams Rocker Arm, Ultra Pro Magnum XD, 1.5 Ratio, For Chevrolet V6 and SBC w/ 3/8 in. Stud, Full Roller, Steel, Set of 12

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COMP Cams Rocker Arm, Ultra Pro Magnum, Full Roller, Chromoly Steel, Self-Aligning 1.6 Ratio, SBC/V6 3/8 in. Stud, Set of 16

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COMP Cams Rocker Arm, Ultra Pro Magnum XD, 1.7 Ratio, 289, 302, 351W w/ 3/8 in. Stud, Full Roller, Steel, Set of 16

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