What other parts do I need to install this camshaft kit?

To get the most out of this aggressive camshaft, COMP Cams recommends pairing it with a 2800+ RPM stall torque converter, an upgraded intake manifold, appropriate rear end gears, and headers. You'll also need to ensure your engine has at least 9.5:1 compression.

What kind of idle can I expect with this camshaft?

This 'Big Mutha' Thumpr' camshaft is designed for a very rough, noticeable idle. It's a signature characteristic of its aggressive performance profile, intended for street/strip applications where that sound is desired.

Is this camshaft kit street legal in all states?

No, this camshaft kit is not CARB approved and cannot be shipped to California due to emissions regulations. Always check local regulations regarding camshaft modifications.

COMP Cams Camshaft Kit 299TH R7 Oldsmobile V8

Name: COMP Cams Camshaft Kit 299TH R7 Thum
Brand: COMP Cams
SKU: comp-cams-comp-cams-camshaft-kit-299th-r7-thum-t14-686098
Price: 1670.96 USD
Availability: BackOrder

COMP Cams Camshaft Kit 299TH R7 Thum

$1670.96

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 kit for Oldsmobile 260-455 V8. Get a serious performance boost with this complete hydraulic roller setup.

Key Features

Fits 1967+ Oldsmobile 260, 307, 350, 403, 400, 425 and 455 V8 engines.
This is a complete K-Kit, including camshaft, lifters, valve springs, retainers, valve locks, valve stem seals, and a timing chain set.
Features a hydraulic roller camshaft with a 'Big Mutha' Thumpr' profile for a very rough idle and significant performance gains.
Requires a 2800+ RPM stall torque converter, upgraded intake, gears, and headers to perform optimally.
Designed for builds needing at least 9.5:1 compression ratio.
Includes assembly lube and decals.

This camshaft kit is designed for 1967 and newer Oldsmobile V8 engines, including 260, 307, 350, 403, 400, 425, and 455 cubic inch displacements.

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Product Details

If you're looking to build a serious street/strip Oldsmobile with a big, aggressive camshaft, this COMP Cams Big Mutha' Thumpr hydraulic roller kit is designed for that kind of build. It's meant for engines like your Oldsmobile 260 through 455 V8, giving you a very noticeable, rough idle that signals serious power potential.

This isn't just a camshaft; it's a complete K-Kit. You get the camshaft itself, a set of lifters, valve springs, retainers, valve locks, and valve stem seals to ensure everything works together perfectly. It also includes a timing chain set to get your valvetrain synchronized, plus assembly lube and decals to finish the job. For this camshaft to really shine, you'll need to pair it with other performance parts like a high-stall torque converter (2800+ RPM), an upgraded intake manifold, appropriate rear end gears, and headers. The kit also specifies a need for at least 9.5:1 compression to make the most of its aggressive profile.

This kit is built for a very specific kind of performance build. The rough idle is a signature of its aggressive nature, and it's intended for vehicles where that kind of sound and feel is desired. Keep in mind this kit is not CARB approved and cannot be shipped to California.