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Technical Articles for Part Number CCA-SK12-678-4
COMP Cams Xtreme Energy Cam and Lifter Kits SK12-678-4
Part Number: CCA-SK12-678-4
COMP Cams Xtreme Energy Cam and Lifter Kits
Cam/Lifters/Timing, Mechanical Flat Tappet, Advertised Duration 282/290, Lift .520/.540, Chevy, 5.0, 5.7L, Kit
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Estimated Ship Date: Apr 8, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
SK12-678-4
Part Type:
Product Line:
Summit Racing Part Number:
CCA-SK12-678-4
UPC:
036584079309
Cam Style:
Solid flat tappet
Basic Operating RPM Range:
2,400-6,800
Camshaft Use:
Street/Strip
Intake Duration at 050 inch Lift:
244
Exhaust Duration at 050 inch Lift:
252
Duration at 050 inch Lift:
244 int./252 exh.
Advertised Intake Duration:
282
Advertised Exhaust Duration:
290
Advertised Duration:
282 int./290 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.520 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.540 in.
Valve Lift with Factory Rocker Arm Ratio:
0.520 int./0.540 exh.
Lobe Separation (degrees):
110
Intake Valve Lash:
0.016 in.
Exhaust Valve Lash:
0.016 in.
Grind Number:
XS282S
Computer-Controlled Compatible:
No
Lifters Included:
Yes
Lifter Style:
Mechanical flat tappet
Valve Springs Included:
No
Retainers Included:
No
Locks Included:
No
Valve Stem Seals Included:
No
Timing Chain and Gears Included:
Yes
Timing Chain Style:
Double roller
Assembly Lubricant Included:
Yes
Pushrods Included:
No
Rocker Arms Included:
No
Gaskets Included:
No
Valve Springs Required:
Yes
Quantity:
Sold as a kit.
COMP Cams Xtreme Energy Cam and Lifter Kits
COMP Cams Xtreme Energy cam and lifter kits are built to take advantage of the latest cam technology and provide maximum performance. Whether your use is off-roading, towing, or street performance, there are Xtreme Energy options available for you. By using an aggressive lobe profile, they provide better throttle response and more top-end horsepower than equivalent kits from other manufacturers, while delivering increased engine vacuum. Order the model designed for your vehicle and engine application.
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Some parts are not legal for use in California or other states with similar laws / regulations
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