What kind of idle can I expect with this camshaft?

This COMP Cams Thumpr camshaft is specifically designed to produce a choppy and thumping idle sound. It's a signature characteristic of the Thumpr series, letting you know your engine has a performance upgrade.

Do I need to replace other parts when installing this camshaft?

It is highly recommended to replace your valve springs and lifters when installing a new camshaft. This ensures proper operation and longevity for the new valvetrain components.

What is the best torque converter and gear ratio to use with this camshaft?

While this camshaft can work with a stock torque converter, it performs best with a converter that has a stall speed of 2000 RPM or higher. Matching this with appropriate rear-end gearing will maximize the performance gains on the street.

COMP Cams Camshaft OL 279T H-107 T Thumper 42-600-5

Name: COMP Cams Camshaft OL 279T H-107 T Thumper
Brand: COMP Cams
Price: 378.83 USD
Availability: InStock

COMP Cams Camshaft OL 279T H-107 T Thumper

$378.83

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 Camshaft OL 279T H-107 T Thumper for Oldsmobile 260-455 V8s. Gives a high-performance street feel with a noticeable choppy idle.

Key Features

Fits 1967+ Oldsmobile 260, 307, 350, 403, 400, 425 and 455 V8 engines.
Features a 226/241 degree intake/exhaust duration profile for improved performance.
Designed for high-performance street applications.
Produces a noticeable choppy/thumping idle sound.
Compatible with stock torque converters, but performs best with a 2000+ RPM stall converter and appropriate gearing.
Manufactured by COMP Cams, a popular name in engine performance parts.

⚠️ 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

If you're looking to give your Oldsmobile V8 a serious performance boost with a distinctive sound, this COMP Cams Thumpr camshaft is a solid option. It's designed for Oldsmobile 260, 307, 350, 403, 400, 425, and 455 cubic inch engines, covering a wide range of applications from 1967 through the early 90s, including popular models like the Cutlass Supreme and Electra. This camshaft is built for high-performance street use, and while it can work with a stock torque converter, you'll get the best results with a 2000+ RPM stall converter and appropriate gearing to match.

What sets the Thumpr series apart is its aggressive, choppy idle – it really lets everyone know you've got something special under the hood. The 226/241 degree intake/exhaust duration profile is tuned to wake up your engine for spirited driving. COMP Cams is well-known for making well-built valvetrain components, and this camshaft is no exception, offering a significant improvement in performance for your street machine.

When installing a camshaft like this, it's always a good idea to replace your valve springs and lifters to ensure optimal performance and longevity. Refer to the manufacturer's installation instructions for detailed guidance on the process.