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COMP Cams 51-246-4 Magnum 248/248 Solid Flat Tappet Camshaft for 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 Solid Flat Tappet Camshaft Ford

Other options in this family: COMP Cams 32-237-4 COMP Cams 32-239-4 COMP Cams 11-217-4 COMP Cams 20-246-4 COMP Cams 32-240-4

Manufacturer

Picture for manufacturer COMP Cams

Part Number

51-246-4
6 reviews
Sale Price

$309.95

2 left at this price

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Product Details

The COMP Cams 51-246-4 Magnum camshaft is a solid flat tappet performance cam designed specifically for Pontiac V8 engines from 265 to 455 cubic inches. This aggressive camshaft features identical 248-degree advertised duration on both intake and exhaust, delivering a strong mid-range to top-end power band ideal for street/strip applications.

Key Specifications:

  • Advertised Duration: 248°/248° (intake/exhaust)
  • Duration at .050": 204°/204°
  • Valve Lift: .420"/.420" (with 1.5:1 rocker ratio)
  • Lobe Separation Angle: 112°
  • Solid flat tappet design for maximum durability and performance
  • Compatible with Pontiac 265, 301, 326, 350, 389, 400, 421, 428, and 455 engines

Performance Characteristics:

  • Recommended RPM range: 1,500-5,500
  • Aggressive lope at idle with strong acceleration
  • Excellent for street performance and bracket racing applications
  • Requires aftermarket valve springs and periodic valve lash adjustment
  • Works best with 9.0:1 or higher compression ratio

This camshaft is part of COMP Cams' legendary Magnum series, engineered with proprietary lobe profiles for optimal performance across the power band. Installation requires matching solid lifters, performance valve springs, and proper break-in procedures. Compatible with stock or aftermarket cylinder heads and intake manifolds.

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 Intake Duration

294

Basic Operating RPM Range

2,500-6,500

Grind Number

294S

Lifter Type

Solid Flat Tappet

Exhaust Valve Lift

0.525

Intake Valve Lift

0.525

Intake Duration at .050 Inch Lift

248

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL51-246-4

K-Kit Upgrade

K51-246-4

Camshaft Series

Magnum

SK-Kit Upgrade

SK51-246-4

Cam Type

Solid Flat Tappet

AMAZON ASIN

B000N5QDD0

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

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 Duration at .050 inch Lift

248

Advertised Exhaust Duration

294

Usage

Street/Strip

exec;;end price, proven product, love paypal checkout, fast, quick, easy

Having a good cross reference to identify the proper part. Please inprove your site. Still give you a 5 star. Never stop improving. Received in a very timely manner. Thank You. Sid

Great price & easy to order.

Autoplicity had the best price that I could find. The product was drop shipped from the factory and the time estimate that Autoplicity said was correct.

Great parts selection and customer service. Little slow shipping

Great Pricing (lowest i can find anywhere) and Quick Shipping, Product has no damage from shipping! Thank you Autoplicity!

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