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Competition Cams 11-602-20
Thumpr NIT 243/257 Hydraulic Flat Cam for Chevrolet Big Block 396-454; Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle. Nitrided.
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Competition Cams 12-602-20
Big Mutha' Thumpr NIT 243/257 Hydraulic Flat Cam for Chevrolet Small Block; Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle. Nitrided.
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