What supporting modifications are needed for this camshaft?

This camshaft requires an aftermarket torque converter with a 2800+ RPM stall speed, lower gear ratios, an aftermarket intake, headers, and a suitable exhaust system to function correctly and achieve its performance goals.

Will this camshaft work with my power brakes?

This camshaft typically reduces idle vacuum. If your vehicle uses power brakes, you will need to install a vacuum canister, vacuum pump, or hydroboost system to ensure proper brake assist.

What is the expected idle quality with this camshaft?

This camshaft is designed for street/strip use and will produce a very rough idle. It is intended to create an aggressive sound characteristic of performance engines.

COMP Cams Big Mutha' Thumpr Camshaft 20-602-4

Name: COMP Cams Camshaft CRS 295T H-107 BMT T
Brand: COMP Cams
Price: 330.15 USD
Availability: InStock

COMP Cams Camshaft CRS 295T H-107 BMT T

$330.15

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

COMP Cams Big Mutha' Thumpr camshaft for Chrysler 273-360 LA engines. Creates an aggressive idle and improves horsepower.

Key Features

Fits Chrysler 273, 318, 340, and 360 LA engines.
Features a 243 degree intake and 257 degree exhaust duration.
Designed for an aggressive, hard-hitting idle sound.
Aims for excellent horsepower gains and a broad torque curve.
Requires a 2800+ RPM stall torque converter, lower gears, intake, and headers.
Typically reduces idle vacuum, requiring a vacuum canister, pump, or hydroboost for power brakes.

⚠️ 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

Starting with a 243/257 intake and exhaust duration split, this COMP Cams Big Mutha' Thumpr camshaft is built for Chrysler LA engines like the 273, 318, 340, and 360. This camshaft is designed to give your muscle car or street rod that unmistakable, aggressive idle that sounds like it's ready to hit the track. It's not just about the sound, though; this grind also aims for solid horsepower gains and a broad torque curve, making your engine feel more responsive across a wider RPM range.

To get the most out of this camshaft and ensure your drivetrain keeps the engine in its powerband, you'll need to pair it with an aftermarket torque converter with a stall speed of 2800 RPM or higher, along with lower gear ratios. You'll also want to make sure you have the right supporting components, like an aftermarket intake, headers, and a good exhaust system. Because this camshaft typically reduces idle vacuum, it's a requirement to have a vacuum canister, pump, or hydroboost system if your vehicle uses power brakes. It also requires at least 9.5:1 compression to perform optimally.

This camshaft is intended for street/strip use and will result in a very rough idle. It's a well-built component for those looking to significantly change the character and performance of their classic Mopar engine.