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COMP Cams 51-226-4 Xtreme Energy Hydraulic Flat Tappet Camshaft Pontiac - for 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

51-226-4
7 reviews
Sale Price

$309.95

Estimated ship date Monday, November 23

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Product Details

The COMP Cams 51-226-4 Xtreme Energy camshaft delivers enhanced performance for Pontiac V8 engines from 265 to 455 cubic inches. This hydraulic flat tappet camshaft features a 250/256 degree advertised duration split, designed to provide a significant boost in mid-range torque and horsepower while maintaining good street manners and reliability.

Key Specifications:

  • Advertised Duration: 250° Intake / 256° Exhaust
  • Duration at .050": 204° Intake / 214° Exhaust
  • Valve Lift (with 1.5 rocker ratio): .447" Intake / .465" Exhaust
  • Lobe Separation Angle: 110°
  • Hydraulic flat tappet design for easy maintenance
  • Compatible with factory valve springs and components

Performance Characteristics:

  • Optimized for street performance and daily driving applications
  • Smooth idle quality with mild lope
  • Strong torque curve from 1,500 to 5,500 RPM
  • Power range: 1,500-5,500 RPM
  • Recommended for engines with stock to mildly modified compression ratios

The Xtreme Energy series from COMP Cams features advanced lobe profiles that maximize efficiency and power output. This camshaft is an excellent choice for street/strip builds, hot rods, and performance street machines where reliable power gains are desired without sacrificing driveability. Compatible with Pontiac 265, 287, 301, 326, 350, 389, 400, 421, 428, and 455 V8 engines.

Note: Requires hydraulic flat tappet lifters (not included). Factory valve springs are typically adequate, but verification is recommended. Professional installation and proper break-in procedures are essential for 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

294

Grind Number

XE294H

Cam Type

Hydraulic Flat Tappet

Intake Valve Lift

0.519

Exhaust Valve Lift

0.524

Basic Operating RPM Range

2,800-6500

Intake Duration at .050 Inch Lift

250

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL51-226-4

K-Kit Upgrade

K51-226-4

SK-Kit Upgrade

SK51-226-4

AMAZON ASIN

B001R9FLDO

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.

Advertised Exhaust Duration

306

Exhaust Duration at .050 inch Lift

256

Camshaft Series

Xtreme Energy

I found it fairly quickly and without much hassle, however i was unsure if it was the part i needed because of lack of details.

Super Fast! Website was easy to user, multiple different payment options (Amazon, Paypal, Credit Card) Got a notification of shipment within 1 hour!

Great service, awesome prices, incredibly fast shipping. A++ I would absolutely suggest you to my friends and family

quick response and unbelievably CHEAP prices.

Ordered a set of 5 steel wheels, distributor messed up and only sent me 4. 5th wheel is taking a good couple weeks to arrive due to the distributor messing up the shipment. Autoplicity did make things right and I can honestly say now I would recommend them.

- Updated review -<br>Autoplicity.com contacted me after my original review and admitted to making a mistake with my order. They have refunded my shipping and I am happy now.<br><br>- Original review -<br>After 18 days the part finally arrived. The filter appears to have been sent directly from K&N, but I ordered on the 20th of June, yet the packing date that K&N Engineering Inc. shows is July 3rd.

Very pleased with Autoplicity's fast and efficient service. The part I ordered fit and looked great. Will definitely consider Autoplicity for future orders. Thanks.

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