What kind of idle can I expect with this camshaft?

This Big Mutha' Thumpr camshaft is designed for aggressive street/strip performance and will produce a very rough idle. This is normal for a camshaft with these specifications, indicating it's optimized for high RPM power.

What supporting modifications are needed for this camshaft?

For optimal performance, this camshaft requires a minimum of 9.5:1 compression, a torque converter with at least a 2800 RPM stall speed, and upgraded intake, rear gears, and headers. It's a significant performance upgrade that needs supporting components.

Is this camshaft legal for use in California?

No, this camshaft is not CARB approved and cannot be shipped to California. Please check your local emissions regulations before purchasing.

COMP Cams LS1 Hydraulic Roller Camshaft 54-602-11

Name: COMP Cams Camshaft LS1 291T HR-109 BMT
Brand: COMP Cams
Price: 618.41 USD
Availability: InStock

COMP Cams Camshaft LS1 291T HR-109 BMT

$618.41

Only 1 left in stock

COMP Cams Big Mutha' Thumpr camshaft for GM LS GEN III/IV engines. Hydraulic roller, 235/249 duration. Part# 54-602-11.

Key Features

Fits 55+ vehicle make/model combinations.
COMP Cams Big Mutha' Thumpr 291T HR-109 BMT camshaft.
Hydraulic roller camshaft for GM LS GEN III/IV engines.
Intake duration is 235 degrees at .050-inch lift; exhaust duration is 249 degrees at .050-inch lift.
109-degree lobe separation angle.
Requires 9.5:1 compression, 2800+ RPM stall converter, intake, gears, and headers for optimal performance.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

This COMP Cams Big Mutha' Thumpr camshaft is a hydraulic roller grind designed for GM LS GEN III and GEN IV engines. You'll get the camshaft itself, ready to be installed in a wide range of vehicles including models like the Chevrolet Corvette, Cadillac CTS, and GMC Yukon. This camshaft is intended for street/strip applications and is engineered to work with engines displacing 4.8L up to 7.0L, including popular variants like the LS1, LS2, LS3, and LS7. It's a significant upgrade for those looking to push their LS engine's performance further.

The 291T HR-109 BMT camshaft features a 235-degree intake and 249-degree exhaust duration at .050-inch lift, with a 109-degree lobe separation angle. For this camshaft to perform optimally, it requires a minimum of 9.5:1 compression, a torque converter with at least a 2800 RPM stall speed, and supporting modifications like an upgraded intake, rear gears, and headers. Expect a very rough idle with this aggressive profile, which is characteristic of cams designed for maximum power output in performance-oriented builds. The hydraulic roller design means it's built for durability and reduced friction compared to flat tappet cams.

This camshaft is a serious upgrade for performance builds. It’s important to note that this part is not CARB approved and cannot be shipped to California. Ensure you have the necessary supporting modifications and a clear understanding of the installation requirements before purchasing.