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COMP Cams 42-237-4 Magnum Hydraulic Flat Tappet Camshaft Oldsmobile - 260-455

(Pontiac Firebird 1977-79, Grand Prix 1977, Bonneville 1977-81, LeMans 1976-77, Catalina 1977-81, Ventura 1975-77, Parisienne 1986 + 31 more models)

Part of: COMP Cams Magnum Hydraulic Flat Tappet Camshaft Ford

Other options in this family: COMP Cams 12-212-2 COMP Cams 35-226-3 COMP Cams 20-232-4 COMP Cams 32-225-4 COMP Cams 12-211-2

Manufacturer

Picture for manufacturer COMP Cams

Part Number

42-237-4
6 reviews
Sale Price

$309.95

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The COMP Cams 42-237-4 Magnum camshaft delivers exceptional performance for Oldsmobile small and big block engines from 260 to 455 cubic inches. This hydraulic flat tappet camshaft features aggressive 253/253 degree advertised duration for strong mid-range to upper RPM power delivery.

Key Specifications:

  • Advertised Duration: 253/253 degrees (intake/exhaust)
  • Duration at .050": 212/212 degrees
  • Valve Lift: .454"/.454" (with 1.6:1 rocker ratio)
  • Lobe Separation Angle: 110 degrees
  • Recommended RPM Range: 1,500-5,500
  • Hydraulic flat tappet design for reliable operation

Performance Characteristics:

  • Produces strong torque and horsepower gains over stock camshafts
  • Delivers aggressive idle with noticeable lope
  • Excellent street performance and throttle response
  • Works with factory or aftermarket cylinder heads
  • Requires valve spring upgrade and proper break-in procedure

This Magnum series camshaft is ideal for performance street builds, weekend cruisers, and mild racing applications. Compatible with stock or aftermarket intake manifolds and headers. Requires matching hydraulic lifters, timing set, and appropriate valve springs (sold separately).

Products specifications

Fits

Pontiac Firebird 1977-79, Grand Prix 1977, Bonneville 1977-81, LeMans 1976-77, Catalina 1977-81, Ventura 1975-77, Parisienne 1986, Bonneville (SE/SSE) 1977-81, Grand LeMans 1976-77, Grand Safari 1977-78, Safari 1987-89, Phoenix 1977 + 26 more models

Advertised Exhaust Duration

305

Advertised Intake Duration

305

Grind Number

305H

Cam Type

Hydraulic Flat Tappet

Intake Valve Lift

0.54

Exhaust Duration at .050 inch Lift

253

Basic Operating RPM Range

3,000-6800

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL42-237-4

K-Kit Upgrade

K42-237-4

Camshaft Series

Magnum

Engine Family

Oldsmobile 260-455 c.i. 8 Cylinder (1967-1990)

SK-Kit Upgrade

SK42-237-4

AMAZON ASIN

B001R98EPG

Assembly Lubricant Included

Yes

Camshaft Gear Attachment

1-Bolt

Lifters Included

No

LOBE SEPARATION

110

Valve Springs Required

Yes

Lifter Type

Hydraulic Flat Tappet

Prop 65

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

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. 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.

Exhaust Valve Lift

0.54

Usage

Street/Strip

Intake Duration at .050 Inch Lift

253

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