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COMP Cams SK12-422-8

Comp Cams Xtreme Energy Hydraulic Roller Camshafts

COMP Cams SK12-422-8

249-SK12-422-8

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COMP Cams SK12-422-8 Comp Cams Xtreme Energy Hydraulic Roller Camshafts $801.99
Xtreme Energy XR270HR Retro-Fit Hydraulic Roller Camshaft Small Kit
Lift: .495''/.502''
Duration: 270°/276°
Lobe Separation Angle: 110°
RPM Range: 1600-5400

COMP Cams SK12-422-8 Details

Chevy 262-400ci Small Block 1955-98
For engines NOT originally equipped with a hydraulic roller camshaft.

High performance application, largest with stock converter, noticeable idle.

Specifications:

Intake Valve Lift (in.)
0.495
Exhaust Valve Lift (in.)
0.502
RPM Range
1600-5400
Int. Duration @ .050 in. (Deg)
218
Exh. Duration @ .050 in. (Deg)
224
Int. Duration Advertised (Deg)
270
Exh. Duration Advertised (Deg)
276
Engine Make/Size
Chevy Small Block (262-400)
Lifter Type
Hydraulic Roller
Usage
Street/Performance
Gaskets Included
No
Advertised Duration
270 int./276 exh.
Advertised Exhaust Duration
276
Advertised Intake Duration
270
Assembly Lubricant Included
No
Basic Operating RPM Range
1,600-5,400
Cam Style
Hydraulic roller tappet
Computer-Controlled Compatible
No
Duration at 050 inch Lift
218 int./224 exh.
Exhaust Duration at 050 inch Lift
224
Exhaust Valve Lift with Factory Rocker Arm Ratio (
0.502
Grind Number
XR270HR
Intake Duration at 050 inch Lift
218
Intake Valve Lift with Factory Rocker Arm Ratio (i
0.495
Lifter Style
Hydraulic roller
Lifters Included
Yes
Locks Included
No
Pushrods Included
No
Quantity
Sold as a kit
Retainers Included
No
Rocker Arms Included
No
Timing Chain and Gears Included
Yes
Timing Chain Style
Double roller
Valve Lift with Factory Rocker Arm Ratio
0.495 int./0.502 exh.
Valve Springs Included
No
Valve Springs Required
No
Valve Stem Seals Included
No
Lobe Separation (Deg)
110
Manufacturer's Part Number:
SK12-422-8

The Leading Edge of Valve Train Technology

Comp Cams Xtreme Energy series can be used in 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 improvements in valve train components and the newest developments in camshaft design. 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 train components with these camshafts due to the aggressive lobe designs.

Features:
  • Quicker opening lobe profiles deliver increased responsiveness & more area under the lift curve
  • More vacuum allows an increase in duration for improved performance and assists power brakes
  • Excellent performance in street carbureted applications
  • Best performance with aftermarket intake manifolds, headers, lower gear ratios

    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.

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