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COMP Cams 51-225-4 Xtreme Energy 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 Xtreme Energy Hydraulic Flat Tappet Camshaft Ford

Other options in this family: COMP Cams 31-238-3 COMP Cams 35-238-3 COMP Cams 35-242-3 COMP Cams 51-222-4 COMP Cams 31-242-3

Manufacturer

Picture for manufacturer COMP Cams

Part Number

51-225-4
6 reviews
Sale Price

$309.95

In Stock (8)

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Product Details

The COMP Cams Xtreme Energy 51-225-4 hydraulic flat tappet camshaft is engineered specifically for Pontiac 265-455 cubic inch V8 engines. This performance camshaft delivers a significant upgrade over stock with its 240/246 degree advertised duration, providing excellent mid-range torque and strong top-end horsepower for street and mild strip applications.

Key Specifications:

  • Advertised Duration: 240° Intake / 246° Exhaust
  • Duration at .050": 208° Intake / 214° Exhaust
  • Valve Lift (with 1.5 ratio): .420" Intake / .442" Exhaust
  • Lobe Separation Angle: 112°
  • Hydraulic flat tappet design for reliable street performance
  • Compatible with stock valve springs and components

Performance Features:

  • Xtreme Energy lobe profiles for improved throttle response
  • Optimized for engines with stock to mildly modified cylinder heads
  • Smooth idle quality with moderate lope
  • Recommended RPM range: 1,500-5,800 RPM
  • Works with stock torque converters and rear gear ratios

This camshaft is ideal for street performance builds, muscle car restorations, and weekend cruisers seeking noticeable power gains without sacrificing driveability. The Xtreme Energy series features advanced lobe design technology that maximizes valve acceleration for improved cylinder filling and power output. Compatible with all Pontiac V8 engines from 265 to 455 cubic inches, including 326, 350, 389, 400, 421, and 428 variants.

Note: Requires hydraulic flat tappet lifters, pushrods, and timing set (sold separately). Professional installation and proper break-in procedures are recommended to ensure optimal performance and longevity.

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

284

Basic Operating RPM Range

2,300-6,500

Grind Number

XE284H

Cam Type

Hydraulic Flat Tappet

Exhaust Valve Lift

0.51

Intake Valve Lift

0.507

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL51-225-4

K-Kit Upgrade

K51-225-4

SK-Kit Upgrade

SK51-225-4

AMAZON ASIN

B000CIOAFG

Engine Family

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

Usage

Street/Performance

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 Duration at .050 inch Lift

246

Intake Duration at .050 Inch Lift

240

Advertised Exhaust Duration

296

Camshaft Series

Xtreme Energy

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