COMP Cams Thumpr 227/241 Hydraulic Roller Cam - Oldsmobile 260-455

SKU: CCA42-600-11

Camshafts

CCA Camshafts

Comp Cams

COMP Cams Thumpr 227/241 Hydraulic Roller Cam - Oldsmobile 260-455

SKU: CCA42-600-11

Camshafts

CCA Camshafts

Limited Availability from MFR Limited stock available from the manufacturer's distribution centre. The dispatch timeframe shown is an estimate based on historical orders of this part. This item is not held in our own warehouse, and availability and release timing may vary depending on manufacturer stock movements and processing at the time of ordering.

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Description

Thumpr 227/241 Hydraulic Roller Cam

Product Overview

Olds; Oldsmobile; Cutlass; Cutlass Supreme; 98; Calais; Ciera; Custom Cruiser; Starfire; Firenza; 88; Rocket; Rocket 88; Vista Cruiser; Delta 88; 260; 442; 307; 350; 403; 400; 425; 455

Product Details

Advertised Exhaust Duration:	303
Advertised Intake Duration:	283
Amazon ASIN:	N/A
Assembly Lubricant Included:	No
Basic Operating RPM Range:	1,700-5,500
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 Roller
Cam and Lifter Kit Upgrade:	CL42-600-11
Camshaft Gear Attachment:	1-Bolt
Camshaft Material:	Billet Steel
Camshaft Series:	Thumpr
Description:	Thumpr 227/241 Hydraulic Roller Cam for Oldsmobile 260-455
Engine Family:	Oldsmobile 260-455 c.i. 8 Cylinder (1967-1990)
Exhaust Duration at .050 inch Lift:	241
Exhaust Valve Lift:	0.515
Grind Number:	283THR7
Intake Duration at .050 Inch Lift:	227
Intake Valve Lift:	0.531
K-Kit Upgrade:	K42-600-11
Lifter Type:	Hydraulic Roller
Lifters Included:	No
Lobe Separation:	107
Part Number:	cca42-600-11
Title:	Thumpr 227/241 Hydraulic Roller Cam for Oldsmobile 260-455
Usage:	Street/Performance
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: 2026-09-27 16:45:50

Specifications

Product Attributes - Brand: COMP Cams
Product Attributes - Manufacturer's Part Number: 42-600-11
Product Attributes - Part Type: Camshafts
Product Attributes - Product Line: COMP Cams Thumpr Hydraulic Roller Camshafts
Product Attributes - UPC: 036584312963
Product Attributes - Cam Style: Hydraulic roller, Retro-fit
Product Attributes - Camshaft Use: Street/Strip
Product Attributes - Basic Operating RPM Range: 1,700-5,500
Product Attributes - Intake Duration at 050 inch Lift: 227
Product Attributes - Exhaust Duration at 050 inch Lift: 241
Product Attributes - Duration at 050 inch Lift: 227 int./241 exh.
Product Attributes - Advertised Intake Duration: 283
Product Attributes - Advertised Exhaust Duration: 303
Product Attributes - Advertised Duration: 283 int./303 exh.
Product Attributes - Intake Valve Lift with Factory Rocker Arm Ratio: 0.531 in.
Product Attributes - Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.515 in.
Product Attributes - Valve Lift with Factory Rocker Arm Ratio: 0.531 int./0.515 exh.
Product Attributes - Lobe Separation (degrees): 107
Product Attributes - Camshaft Gear Attachment: 1-bolt
Product Attributes - Remanufactured: No
Product Attributes - Computer-Controlled Compatible: No
Product Attributes - Grind Number: 283THR7
Product Attributes - Valve Springs Required: Yes
Product Attributes - Quantity: Sold individually.