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Technical Articles for Part Number CCA-K11-770-8
COMP Cams Xtreme Energy Cam and Lifter Kits
Cam/Lifter, Valvetrain, Mechanical Roller Tappet, Advertised Duration 274/280, Lift .639/.646, Chevy, 396-454
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Estimated Ship Date: May 18, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
K11-770-8
Part Type:
Product Line:
Summit Racing Part Number:
CCA-K11-770-8
UPC:
036584064053
Cam Style:
Solid roller, Retro-fit
Basic Operating RPM Range:
2,200-6,200
Camshaft Use:
Street/Strip
Intake Duration at 050 inch Lift:
236
Exhaust Duration at 050 inch Lift:
242
Duration at 050 inch Lift:
236 int./242 exh.
Advertised Intake Duration:
274
Advertised Exhaust Duration:
280
Advertised Duration:
274 int./280 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.639 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.646 in.
Valve Lift with Factory Rocker Arm Ratio:
0.639 int./0.646 exh.
Lobe Separation (degrees):
110
Intake Valve Lash:
0.016 in.
Exhaust Valve Lash:
0.018 in.
Grind Number:
CB XR274 R-10
Computer-Controlled Compatible:
No
Lifters Included:
Yes
Lifter Style:
Mechanical roller
Valve Springs Included:
Yes
Outside Diameter of Outer Spring (in.):
1.535 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:
No
Pushrods Included:
No
Rocker Arms Included:
No
Gaskets Included:
No
Valve Springs Required:
No
Quantity:
Sold as a kit.
Notes:
Requires thrust button and wear plate.
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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