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COMP Cams CL12-234-2 - Comp Cams 'Xtreme Energy' Hydraulic Flat Tappet Camshafts

COMP Cams CL12-234-2 - Comp Cams 'Xtreme Energy' Hydraulic Flat Tappet Camshafts

COMP Cams#249-CL12-234-2

Xtreme Energy XE256H Hydraulic Flat Tappet Camshaft & Lifter Kit
Lift: .447''/.454''
Duration: 256°/268°
RPM Range: 1000-5200
  • Fits Applications:
  • 1977-1980
    BUICK
    1955-1986
    CHEVROLET
    1967-1986
    GMC
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COMP Cams CL12-234-2 - Comp Cams 'Xtreme Energy' Hydraulic Flat Tappet Camshafts Details

Chevy 262-400ci Small Block 1955-98

*Note: In order to use these camshafts in 1955-57 265ci blocks, it is necessary to machine a small groove in the rear main journal of the cam to allow oil flow to the top of the engine.

Strong torque thru low end & mid-range, good idle.

Operating Range:1000-5200 RPM
Duration Advertised:256° Intake / 268° Exhaust
Duration @ .050'' Lift:212° Intake / 218° Exhaust
Valve Lift w/1.5 Rockers:.447'' Intake / .454'' Exhaust
Lobe Separation Angle:110°

COMP Cams CL12-234-2 - Comp Cams 'Xtreme Energy' Hydraulic Flat Tappet Camshafts

The Leading Edge of Valve Train Technology

Comp Cams Xtreme Energy series are perfect for any street or street/strip application where both throttle response and top-end horsepower is desired. These camshafts are designed to take advantage of the latest and greatest in valvetrain technology . Their aggressive lobe design produces better throttle response and top end horsepower than other cams with the same duration @ .050'' lift, while delivering increased engine vacuum. We do not recommend the use of stock valve springs with these camshafts due to the aggressive lobe designs.

Camshaft & Lifter Kits are indicated by a CL in their part number and include Camshaft, Lifters, Assembly Lube, Decals, and Instructions.

Complete Kits are indicated by a K in their part number and include Camshaft, Lifters, Timing Chain & Gears, Valve Springs, Retainers, Locks, Assembly Lube, Decals, and Instructions.

Small Kits are indicated by a SK in their part number and include Camshaft, Lifters, Timing Chain Set, Assembly Lube, Decals, and Instructions.

COMP Cams 249-CL12-234-2

Intake Valve Lift (in.)
0.447
Exhaust Valve Lift (in.)
0.454
RPM Range
1000-7000
Int. Duration @ .050 in. (Deg)
212
Exh. Duration @ .050 in. (Deg)
218
Int. Duration Advertised (Deg)
256
Exh. Duration Advertised (Deg)
268
Engine Make/Size
Chevy Small Block (262-400)
Lifter Type
Hydraulic Flat Tappet
Usage
Street/Performance
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