COMP Cams CB 291T HR-107 MT Thump Series Camshaft for Chevrolet Big Block Engines Part #11-601-8

Designed 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 always puts the engine in its powerband. Additionally, Thumpr camshafts typically deliver reduced vacuum at idle, making a vacuum canister, pump or hydroboost a requirement for vehicles running power brakes. High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle. Chevrolet GEN IV 396-454 Big Block Engines Originally Equipped with Flat Tappet Camshafts

The COMP Cams CB 291T HR-107 MT Thump Series camshaft is engineered to deliver an aggressive and powerful exhaust note at idle, making it an ideal choice for muscle cars and street rods. This camshaft features early intake valve opening and long exhaust duration, creating a broad torque curve and enhancing horsepower gains. Its design promotes a race-inspired idle with optimal overlap, providing a distinctive sound and performance boost for high-performance street and strip applications. Suitable for Chevrolet Gen IV 396-454 big block engines originally equipped with flat tappet camshafts, it requires an aftermarket torque converter and lower gear ratio to maximize power delivery. The camshaft's specifications, including its duration and lift, contribute to a rough idle and robust performance at 2500+ RPM stall speeds, especially when paired with appropriate intake, headers, and gears. The Thumpr series is not carb-approved and demands acknowledgment of its compatibility with specific engine setups. Designed for engines with 9:1 compression ratios, it is perfect for enthusiasts seeking significant horsepower and torque improvements in street-driven muscle cars. This camshaft is a high-performance upgrade that transforms engine sound and power, making it a popular choice among performance enthusiasts aiming for a distinct, aggressive exhaust note and substantial power gains.

Features:

• Aggressive idle with a race car sound

• Broad torque curve with excellent horsepower gains

• Early intake valve opening and long exhaust duration

• Designed for Chevrolet Gen IV 396-454 big block engines

• Requires aftermarket torque converter and lower gear ratio

• Perfect for street/strip applications with 9:1 compression

• Enhances performance with intake, headers, and gears

• Not carb-approved, requires acknowledgment for installation

• Ideal for high-performance street and muscle cars