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Technical Articles for Part Number CCA-K12-679-5
COMP Cams Xtreme Energy Cam and Lifter Kits
Cam/Lifter, Valvetrain, Mechanical Flat Tappet, Advertised Duration 290/298, Lift .540/.558, Chevy Small Block
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Estimated Ship Date: Dec 14, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
K12-679-5
Part Type:
Product Line:
Summit Racing Part Number:
CCA-K12-679-5
UPC:
036584079385
Cam Style:
Solid flat tappet
Basic Operating RPM Range:
2,800-7,200
Camshaft Use:
Street/Strip
Intake Duration at 050 inch Lift:
252
Exhaust Duration at 050 inch Lift:
260
Duration at 050 inch Lift:
252 int./260 exh.
Advertised Intake Duration:
290
Advertised Exhaust Duration:
298
Advertised Duration:
290 int./298 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.540 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.558 in.
Valve Lift with Factory Rocker Arm Ratio:
0.540 int./0.558 exh.
Lobe Separation (degrees):
110
Intake Valve Lash:
0.016 in.
Exhaust Valve Lash:
0.016 in.
Grind Number:
CS XS290S-10
Computer-Controlled Compatible:
No
Lifters Included:
Yes
Lifter Style:
Mechanical flat tappet
Valve Springs Included:
Yes
Outside Diameter of Outer Spring (in.):
1.430 in.
Retainers Included:
Yes
Locks Included:
Yes
Valve Stem Seals Included:
Yes
Timing Chain and Gears Included:
Yes
Timing Chain Style:
Double non-roller
Assembly Lubricant Included:
Yes
Pushrods Included:
No
Rocker Arms Included:
No
Gaskets Included:
No
Valve Springs Required:
No
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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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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