COMP Cams Mutha' Thumpr Hydraulic Roller Camshaft - 107 LSA - Big Block Chevy 28120BK motorsports series

motorsports series

Firewall mounted bracket is pre-drilled to accept Allstar power brake boosters or most manual brake master cylinders and includes a dash support bracket

2007-2013 GMC Sierra 2500 HD SLE Extended Cab Pickup

yet comfortable feel while a driver sits in the car

Popular in crate engines and high-performance V-8 engines

COMP Cams Mutha' Thumpr Hydraulic Roller Camshaft - 107 LSA - Big Block Chevy 28120BK motorsports seriesDesigned 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