What kind of idle sound can I expect from this COMP Cams Thumpr kit?

This kit is specifically designed to produce a choppy and thumping idle sound, often referred to as a 'Thumpr' idle. It's a signature characteristic of this camshaft series, giving your engine an aggressive and noticeable presence.

What is the best torque converter and gearing to use with this camshaft kit?

While the camshaft can work with a stock torque converter, it performs best with a converter rated for 2000 RPM or higher. Pairing it with appropriate rear-end gearing will help keep the engine in its optimal power band for improved performance.

What components are included in the COMP Cams CL34-600-9 kit?

The kit comes complete with the camshaft, a set of hydraulic roller lifters, assembly lube for proper installation and break-in, decals for your engine bay, and detailed installation instructions.

COMP Cams Cam & Lifter Kit FF 283Th R7 CL34-600-9

Name: COMP Cams Cam & Lifter Kit FF 283Th R7
Brand: COMP Cams
SKU: comp-cams-comp-cams-cam-lifter-kit-ff-283th-r7-t14-4395924
Price: 1379.15 USD
Availability: BackOrder

COMP Cams Cam & Lifter Kit FF 283Th R7

$1379.15

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 Cam & Lifter Kit FF 283Th R7. Hydraulic roller kit for Ford 429-460 with a choppy idle.

Key Features

Fits Ford Big Block/385 Series 429 and 460 engines.
Hydraulic roller camshaft and lifter kit.
Camshaft specs: 227/241 duration at .050 inch lift.
Designed for high-performance street use with a choppy/thumping idle.
Works with stock torque converters, but best with 2000+ RPM converter and gears.
Kit includes camshaft, lifters, assembly lube, decals, and instructions.

⚠️ 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

COMP Cams is well-known for performance engine components, and their Thumpr camshafts are designed to give your engine a distinctive, aggressive idle sound. This CL34-600-9 kit is specifically for Ford Big Block 385 series engines, including the 429 and 460 cubic inch displacements. If you're looking to give your classic Ford or Mercury a noticeable rumble and improved street performance, this kit is a solid option.

This is a hydraulic roller camshaft kit, meaning it uses roller lifters for reduced friction and better performance compared to flat tappet designs. The cam profile, with its 227/241 duration at .050 inch lift, is tuned for a high-performance street application. It's designed to work with a stock torque converter, but you'll see the best results with a converter rated for 2000 RPM or higher, along with appropriate gearing to keep the engine in its power band. Expect a choppy, thumping idle that lets everyone know you mean business.

Included in this kit is everything you need to get started: the camshaft itself, a set of hydraulic roller lifters, assembly lube to ensure proper break-in, and decals for your engine bay. Instructions are also provided to guide you through the installation process. This kit fits a wide range of Ford and Mercury vehicles from the late 1960s through the late 1970s, such as the Ford LTD, Mercury Marquis, and Ford Thunderbird.