Engines and Components› Camshafts and Valvetrain

COMP Cams

SBC Thumpr Series Hyd. Roller Cam 291THR7

$560.61

SKU: C007 12-601-8

In Stock
In Stock
Ships by Nov 3
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Overview

The COMP Cams Thumpr camshaft is a hydraulic roller, retro-fit camshaft designed for street/strip applications. It features a lift of 0.522 inches on the intake and 0.509 inches on the exhaust, with a duration of 291/311 degrees and a lobe separation angle of 107 degrees.

Designed for engines originally equipped with flat tappet camshafts, the Thumpr camshaft utilizes a lobe profile with early exhaust valve opening, long exhaust duration, and significant overlap to achieve its signature rough idle. It operates effectively in the 2200-5900 RPM range and is compatible with engines requiring 9:1 compression and a 2500+ stall torque converter, along with intake, gears, and headers.
Show original supplier description

Part #: 12-601-8

WARNING: Camshaft Optimized for use with a Melanized or Nitrided distributor Gear. Not compatible with cast or Steel Gears without similar surface treatments. Failure to utilize the proper distributor Gear will void all warranties and/or return policies.

High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.

This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandCOMP Cams
Part NumberC007 12-601-8

Videos

About MOTORMIA

5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold

Buy with Confidence

Returns & Fitment

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.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy