COMP Cams Camshaft CRB3 299Th R7 Thumper

COMP Cams Camshaft CRB3 299Th R7 Thumper

Marsoni

M251S

$244.97

Get it in 3 business days with 1 day shipping. Friday, May 29

COMP Cams Camshaft CRB3 299Th R7 ThumperDesigned to deliver an aggressive, hard hitting exhaust note at idle, the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods, the Thumpr series' early intake valve opening and long exhaust duration create optimum overlap for that race car idle. The Thumpr grinds all require an aftermarket torque converter and lower gear ratio to ensure the drivetrain

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It is a true struggle to get my feet into these. I bought size 12, and you would think they'd scale up the opening for larger foot sizes, but no. I feel like I'm going to rip the tag off every time I have to stretch them out to get them on. So far they have held up. (Tip: start with your foot sideways, then rotate the shoe once you get it in halfway to the heel.) That said, these shoes are beautiful and comfortable (once you get them on). They're warm, and they perform well on the snow (after waterproofing).

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Reviewed in the United States on January 18, 2026