What kind of idle can I expect with this camshaft?

This COMP Cams Mutha' Thumpr camshaft is designed for high performance and produces a rough, noticeable idle. This is typical for cams with aggressive duration and lift profiles intended for street/strip use.

What other modifications are recommended for this camshaft?

To achieve optimal performance, COMP Cams recommends a minimum of 9:1 compression, a 2500+ RPM stall torque converter, an upgraded intake manifold, performance gears, and headers. These parts help the engine utilize the camshaft's capabilities.

Can this camshaft be shipped to California?

No, this camshaft is not CARB approved and cannot be shipped to California due to emissions regulations.

COMP Cams Hydraulic Flat Cam 20-601-4 - Chrysler LA

Name: COMP Cams Camshaft CRS 287T H-107 MT Th
Brand: COMP Cams
Price: 330.15 USD
Availability: InStock

COMP Cams Camshaft CRS 287T H-107 MT Th

$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 Mutha' Thumpr camshaft for Chrysler 273-360 LA engines. High performance street/strip cam with a rough idle.

Key Features

Fits Chrysler 273, 318, 340, and 360 LA engines.
Hydraulic flat tappet camshaft with 235/249 degrees duration at .050 lift.
Designed for high-performance street and strip use.
Requires a minimum of 9:1 compression ratio.
Needs a torque converter with a 2500+ RPM stall speed.
Best results when paired with an upgraded intake, gears, and headers.

⚠️ 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 235/249 degree intake/exhaust duration at .050 lift, this COMP Cams Mutha' Thumpr camshaft is built for high-performance street and strip applications. It's designed for Chrysler LA engines, specifically the 273, 318, 340, and 360 cubic inch V8s. This cam will give your engine a noticeable, rough idle that signals its performance intentions.

To get the most out of this camshaft, you'll need to ensure your engine is set up correctly. COMP Cams recommends a minimum of 9:1 compression ratio, a torque converter with at least a 2500 RPM stall speed, and supporting modifications like an upgraded intake manifold, performance gears, and headers. These components work together to help the camshaft breathe and perform at its best, especially when you're pushing your vehicle hard.

This camshaft is a popular choice for Mopar enthusiasts looking to wake up their classic V8. While it offers a significant performance bump, be aware that it's not CARB approved and cannot be shipped to California. It's also important to note that this cam produces a rough idle, which is characteristic of its aggressive performance profile.