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COMP Cams 51-241-4 Magnum Hydraulic Flat Tappet Camshaft Pontiac - 265-455

(Pontiac GTO 1964-73, Firebird 1967-81, Grand Prix 1962-80, Grand Am 1973-75, 1978-80, Bonneville 1958-80, LeMans 1963-81, Catalina 1955-80 + 23 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

51-241-4
6 reviews
Sale Price

$309.95

2 left at this price

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Product Details

The COMP Cams 51-241-4 is a high-performance hydraulic flat tappet camshaft designed specifically for Pontiac V8 engines from 265 to 455 cubic inches. This Magnum series camshaft features an aggressive 253/253 degree advertised duration profile, making it ideal for drag racing and serious street/strip applications where maximum power is the priority.

Key Specifications:

  • Advertised Duration: 253°/253° intake and exhaust
  • Duration at .050": 212°/212° intake and exhaust
  • Valve Lift: .454"/.454" intake and exhaust (with 1.5:1 rocker ratio)
  • Lobe Separation Angle: 110°
  • Hydraulic flat tappet design for reliable operation
  • Optimized for engines with 9.0:1 to 10.5:1 compression ratio

Performance Characteristics:

  • Power range: 1,500-6,000 RPM
  • Strong mid-range to top-end power delivery
  • Produces a noticeable lopey idle
  • Requires aftermarket torque converter (2,400-2,800 stall recommended)
  • Best suited for manual transmission or automatic with performance converter

This camshaft delivers excellent performance gains for muscle-era Pontiac engines including 326, 350, 389, 400, 421, 428, and 455 applications. The aggressive profile provides strong acceleration and top-end power, making it perfect for weekend warriors and drag strip competitors. Requires valve spring upgrade and careful attention to valvetrain geometry for optimal performance and reliability.

Products specifications

Fits

Pontiac GTO 1964-73, Firebird 1967-81, Grand Prix 1962-80, Grand Am 1973-75, 1978-80, Bonneville 1958-80, LeMans 1963-81, Catalina 1955-80, Tempest 1961-70, Ventura 1960-61, 1971-75, 1977, Parisienne 1967-68, 1972-74 + 20 more models

Advertised Exhaust Duration

305

Advertised Intake Duration

305

Cam Type

Hydraulic Flat Tappet

Exhaust Valve Lift

0.525

Intake Valve Lift

0.525

Exhaust Duration at .050 inch Lift

253

Basic Operating RPM Range

3,000-6500

Grind Number

305H-10

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL51-241-4

K-Kit Upgrade

K51-241-4

Camshaft Series

Magnum

SK-Kit Upgrade

SK51-241-4

AMAZON ASIN

B001O07IL4

Engine Family

Pontiac 265-455 C.I. 8 Cylinder (1955-1981)

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.

Usage

Street/Strip

Intake Duration at .050 Inch Lift

253

Great price and free shipping. Can"t beat that.

Fast service purchased from them many times no problems and usually have coupon codes!! Will do buissiness with again.

the prices were great lowest i found on the net and the shipping is fast

Cheapest price by far, not the speediest shipment unfortunately.

Found the best price at Autoplicity on my cold air intake. Quick turn-around time and inexpensive shipping. I'll definitely be back.

Great pricing on almost every product! Quick process and fast shipping! Will definitely order from Autoplicity again in the future.

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