Seller notes

COMP Cams 11-747-14 Camshaft, Mechanical Roller Tappet, Advertised Duration 321/336, Lift .748/.748, Chevy, Big Block, Each. Please Click on the "Read More" link for additional details about this item. Thank you, Summit Racing Equipment. The World's Speed Shop Since 1968 Advertised Duration 321 int./336 exh. Advertised Exhaust Duration 336 Advertised Intake Duration 321 Basic Operating RPM Range 5,000-8,500 Cam Style Mechanical roller tappet Computer-Controlled Compatible No Duration at 050 inch...

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