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COMP Cams Camshaft OL 295T H-107 T Thumper

SKU: CCA42-602-5

Camshafts

CCA Camshafts...

COMP Cams Camshaft OL 295T H-107 T Thumper

SKU: CCA42-602-5

Camshafts

CCA Camshafts...

Sale ends in Calculating...

A$730.55 A$814.12
Last Available from MFR. LAST ONE AVAILABLE from the manufacturer's distribution centre. Once sold, this item may not be immediately available again. The dispatch timeframe shown is an estimate based on historical orders for this part and is dependent on the manufacturer releasing the final available unit.
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Description

Big Mutha' Thumpr 242/257 Hydraulic Flat Cam for Oldsmobile 260-455. Street/strip, needs 9.5:1 compression, 2800+ stall, intake, Gears and headers, very rough idle.

Product Overview

*Thumpr Camshafts* * Three unique cam designs for each application that deliver excellent horsepower gains and broad torque curve; perfect choice for muscle cars and street rods * Early intake valve opening and long exhaust duration create optimum overlap for powerful, hard-hitting exhaust note * Best with aftermarket converters and more rear gear

Product Details

Advertised Exhaust Duration:312
Advertised Intake Duration:294
Amazon ASIN:B005H89WWW
Assembly Lubricant Included:Yes
Basic Operating RPM Range:2,500-6,400
C.A.R.B. E.O. Number:N/A
C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?:Yes, but must meet tailpipe emission standards for year of vehicle.
C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?:Yes, but must meet tailpipe emission standards for year of vehicle.
C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?:Yes, but must meet tailpipe emission standards for year of vehicle.
C.A.R.B. Exempt for On-Road Vehicles?:No
C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?:Yes, but must be a race/competition only vehicle.
C.A.R.B. Exemption Reason:N/A
California Proposition 65:WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov
Cam Type:Hydraulic Flat Tappet
Cam and Lifter Kit Upgrade:CL42-602-5
Camshaft Gear Attachment:1-Bolt
Camshaft Material:Cast Iron
Camshaft Series:Thumpr
Description:Big Mutha' Thumpr 242/257 Hydraulic Flat Cam for Oldsmobile 260-455
Engine Family:Oldsmobile 260-455 c.i. 8 Cylinder (1967-1990)
Exhaust Duration @ .050 in.:257
Exhaust Duration at .050 inch Lift:257
Exhaust Duration:312
Exhaust Valve Lift(in):0.497
Exhaust Valve Lift:0.497
Grind Number:295TH7
Intake Duration @ .050 in.:242
Intake Duration at .050 Inch Lift:242
Intake Duration:294
Intake Valve Lift(in):0.512
Intake Valve Lift:0.512
K-Kit Upgrade:K42-602-5
Lifter Type:Hydraulic Flat Tappet
Lifters Included:No
Lobe Separation:107
Part Number:cca42-602-5
RPM Range:2500-7200
Title:Big Mutha' Thumpr 242/257 Hydraulic Flat Cam for Oldsmobile 260-455
Usage:Street/Strip
Valve Springs Required:Yes

Application Summary

Fits 1967+ Oldsmobile 260, 307, 350, 403, 400, 425 and 455 V8

Part Type

Engine Camshaft

Data: v4.2 - Upd: 2026-10-17 12:18:03

Specifications

Product Attributes - Brand
COMP Cams
Product Attributes - Manufacturer's Part Number
42-602-5
Product Attributes - Part Type
Camshafts
Product Attributes - Product Line
COMP Cams Thumpr Hydraulic Flat Tappet Camshafts
Product Attributes - UPC
036584213208
Product Attributes - Cam Style
Hydraulic flat tappet
Product Attributes - Camshaft Use
Street/Strip
Product Attributes - Camshaft Manufacturers Description
Big Mutha Thumpr. Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
Product Attributes - Basic Operating RPM Range
2,500-6,400
Product Attributes - Intake Duration at 050 inch Lift
242
Product Attributes - Exhaust Duration at 050 inch Lift
257
Product Attributes - Duration at 050 inch Lift
242 int./257 exh.
Product Attributes - Advertised Intake Duration
294
Product Attributes - Advertised Exhaust Duration
312
Product Attributes - Advertised Duration
294 int./312 exh.
Product Attributes - Intake Valve Lift with Factory Rocker Arm Ratio
0.512 in.
Product Attributes - Exhaust Valve Lift with Factory Rocker Arm Ratio
0.497 in.
Product Attributes - Valve Lift with Factory Rocker Arm Ratio
0.512 int./0.497 exh.
Product Attributes - Lobe Separation (degrees)
107
Product Attributes - Remanufactured
No
Product Attributes - Computer-Controlled Compatible
No
Product Attributes - Grind Number
295TH7
Product Attributes - Valve Springs Required
Yes
Product Attributes - Quantity
Sold individually.

Reference Information

Brand Name/s Comp Cams
StreetFX SKU cca42-602-5
SFX Item ID 4120045
Supplier Item Code 4120045
Manufacturer SKU 42-602-5
Manufacturer UPC 36584213208
Alternative References 295T, H-107

Compatibility

Fits 1967+ Oldsmobile 260, 307, 350, 403, 400, 425 and 455 V8

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