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COMP Cams 11-254-4 Xtreme Energy Hydraulic Flat Camshaft 250/256 Duration Chevy Big Block 396-454

(Chevrolet Camaro 1967-72, Corvette 1966-74, Impala 1965-76, Malibu 1966-67, 1973-75, C1500 1990-93, Chevelle 1965-73, Blazer 1973-74 + 106 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

11-254-4
6 reviews
Sale Price

$309.95

In Stock (10+)

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Product Details

The COMP Cams Xtreme Energy 11-254-4 hydraulic flat tappet camshaft is engineered specifically for Chevrolet Big Block engines (396-454 cubic inches), delivering aggressive performance gains while maintaining excellent drivability. This camshaft is part of COMP's proven Xtreme Energy series, designed to maximize mid-range torque and top-end horsepower for street/strip applications.

Camshaft Specifications:

  • Advertised Duration: 250° intake / 256° exhaust
  • Duration at .050": 206° intake / 212° exhaust
  • Valve Lift (with 1.7 rocker ratio): .447" intake / .454" exhaust
  • Lobe Separation Angle: 110°
  • Hydraulic flat tappet design for reliable operation
  • Recommended RPM range: 1,500-5,800 RPM
  • Recommended valve springs and pushrods required (sold separately)

Performance Characteristics:

  • Produces strong midrange torque with excellent throttle response
  • Noticeable lope at idle with aggressive sound
  • Ideal for street performance vehicles, muscle car restorations, and bracket racing
  • Works well with stock or mildly modified cylinder heads
  • Requires 9.0:1+ compression ratio for optimal performance

This camshaft requires proper break-in procedure using COMP Cams break-in oil additive. Compatible with factory or aftermarket intake manifolds and exhaust systems. Professional installation and proper valvetrain setup recommended for best results.

Products specifications

Fits

Chevrolet Camaro 1967-72, Corvette 1966-74, Impala 1965-76, Malibu 1966-67, 1973-75, C1500 1990-93, Chevelle 1965-73, Blazer 1973-74, C10 Pickup 1968-80, Caprice 1966-76, C10 1975-81, El Camino 1966-75, Monte Carlo 1970-75 + 101 more models

Advertised Intake Duration

294

Grind Number

XE294H

Cam Type

Hydraulic Flat Tappet

Exhaust Valve Lift

0.593

Intake Valve Lift

0.588

Intake Duration at .050 Inch Lift

250

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL11-254-4

K-Kit Upgrade

K11-254-4

SK-Kit Upgrade

SK11-254-4

Usage

Street/Performance

Assembly Lubricant Included

Yes

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.

Basic Operating RPM Range

2,800-7000

Camshaft Gear Attachment

3-Bolt

Advertised Exhaust Duration

306

Exhaust Duration at .050 inch Lift

256

Engine Family

Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)

AMAZON ASIN

B000CESFIS

Camshaft Series

Xtreme Energy

Great pricing on hard to find products. Fast processing and shipping.

Purchase process an amount of time from purchase, an product being shipped is short an sweet!

thanks

Great prices and FAST shipping!! Definitely will buy products here again!

Lowest price on the Internet. Fast shipping.

Great price and quick shipping!

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