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Mutha' Thumpr 235/249 Hydraulic Roller, Ford 221-302

Part Number 31-601-9 (132973078)
UPC: 36584003564
Package contents: 1 Each per Box
MADE IN USA
$562.95 FREE SHIPPING
Out of stock
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Description

The COMP Cams Thumpr camshaft delivers a signature lopey idle, strong low- to mid-RPM torque, and improved horsepower, making it ideal for street/strip builds seeking aggressive sound, throttle response, and classic muscle performance. Designed for high-performance street applications, it provides an unmistakable idle quality while pairing exceptionally well with popular upgrades like the Edelbrock RPM Air Gap intake manifold and TCI Saturday Night Special torque converter. Built with full-size base circles for added durability, this cam works seamlessly with COMP Cams Evolution hydraulic roller tappets and eliminates the need for dog bones and lifter retainers—components never intended for pre-1985 applications. This camshaft supersedes part number 31-600-8, delivering proven performance and simplified valvetrain compatibility in one upgraded design.

COMP Cams® is the leading American manufacturer of high-quality, performance-based internal engine components, including camshafts, valve springs, rocker arms, lifters, pushrods, and other valve train components. We help our customers with innovative technological advancements through extensive research and development. Our quality workmanship and engineering ensure confidence for racers and street performance enthusiasts. COMP Cams is a proud member of the Edelbrock Group family of brands, which include Edelbrock®, FAST® (Fuel Air Spark Technology), TCI® Automotive, Russell® Performance and Lunati Power®. Headquartered in Olive Branch, Mississippi, COMP Cams remains an innovative American company focused on results-driven technology and superior customer support. We believe in the automotive lifestyle and continue to support the passion for our American pastime. For more information about the Edelbrock Group or any partner brands, visit www.edelbrockgroup.com.

Features & benefits

  • Eliminates the need for dog bones and lifter retainers, which were never intended for use in pre-1985 applications.
  • Features full-size base circles, works seamlessly with our Comp Cams Evolution hydraulic roller tappets.
  • Supersedes 31-601-8
  • Melling offers a full line of OE replacement and high performance camshafts for cars, light duty, medium duty and heavy duty trucks. Melling listings include OEM applications to match the engine requirements desired including horsepower, economy and needed engine torque. Melling camshafts are developed, engineered, tested and manufactured with the highest standards of quality and materials.

Specifications

Advance 5 dd
Advertised Exhaust Duration 311 dd
Advertised Intake Duration 291 dd
Basic Operating RPM Range 2200 - 5900 r3
Cam Type Hydraulic Roller
Camshaft Series Thumpr
Computer Controlled Compatible No
Country Of Origin USA
Cross Sell / Upsell Part Numbers 89311-16, 1431-16, 431M, 26986-16
Direct Injection No
Engine Platform Ford Small Block
Exhaust Duration At .050 Inch Lift 249 dd
Exhaust Lobe Lift 0.329 in
Exhaust Valve Lash Hyd
Exhaust Valve Lift With Factory Rocker Arm Ratio 0.526 in
Factory Rocker Ratio 1.6
Firing Order FS/FF
Fuel Management Strategy Compatible No
Intake Centerline 102 dd
Intake Duration At .050 Inch Lift 235 dd
Intake Lobe Lift 0.338 in
Intake Valve Lash Hyd
Intake Valve Lift With Factory Rocker Arm Ratio 0.541 in
Lifter Type Roller Tappet
Lobe Separation 107 dd
Material Billet Steel
Valve Springs Required Yes
VVT Compatible No

Videos and guides

California residents

WARNING: This product can expose you to Zinc Dithiophosphate, Paraffinic Pertroleum Oil, Anthraquinone Dye, known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.

Carb Status

California carb status to be completed

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