Engines and Components› Camshafts and Valvetrain

COMP Cams

Thumpr 226/241 H-Flat K-Kit Olds 260-455

$840.50

SKU: C007 K42-600-5

In Stock
In Stock
Ships by Jun 10
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Non-Returnable Item
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Description

The COMP Cams K42-600-5 Thumpr K-Kit is a high-performance hydraulic flat cam kit designed for Oldsmobile 260-455 cubic inch, 8-cylinder engines from 1967-1990. This kit is best suited for street/performance applications requiring a 2000+ stall converter and upgraded gears, producing a distinctive choppy idle sound. The kit includes the camshaft, hydraulic flat tappet lifters, valve springs, and assembly lubricant. Please note that valve train upgrades are required, and the camshaft may affect engine vacuum. Specific Oldsmobile models compatible with this engine range were not precisely determined during research.

Fitment

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Specifications

BrandCOMP Cams
Part NumberC007 K42-600-5

Videos

Comp Cams Thumpr vs. Xtreme Cam Sound Comparison

Comp Cams Thumpr vs. Xtreme Cam Sound Comparison
1971 c10 454 comp thumpr 227/241

1971 c10 454 comp thumpr 227/241
Chevy 350 Camshaft Sound Comparison. Comp Cams Thumpr & Comp XE Cam #chevy #dragracing #automobile

Chevy 350 Camshaft Sound Comparison. Comp Cams Thumpr & Comp XE Cam #chevy #dragracing #automobile
455 10to1 compression on pistons comp cam camshaft rockers & guild plate WESTCHESTER CRANKSHAFTs

455 10to1 compression on pistons comp cam camshaft rockers & guild plate WESTCHESTER CRANKSHAFTs

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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