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Technical Articles for Part Number CCA-SK21-224-4
COMP Cams Xtreme Energy Cam and Lifter Kits
Cam/Lifters/Timing, Hydraulic Flat Tappet, Adv. Duration 274/286, Lift .488/.491, Mopar, Big Block, Kit
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Estimated Ship Date: Dec 14, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
SK21-224-4
Part Type:
Product Line:
Summit Racing Part Number:
CCA-SK21-224-4
UPC:
036584046707
Cam Style:
Hydraulic flat tappet
Basic Operating RPM Range:
1,800-6,000
Camshaft Use:
Street/Strip
Intake Duration at 050 inch Lift:
230
Exhaust Duration at 050 inch Lift:
236
Duration at 050 inch Lift:
230 int./236 exh.
Advertised Intake Duration:
274
Advertised Exhaust Duration:
286
Advertised Duration:
274 int./286 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.488 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.491 in.
Valve Lift with Factory Rocker Arm Ratio:
0.488 int./0.491 exh.
Lobe Separation (degrees):
110
Camshaft Gear Attachment:
1-bolt
Grind Number:
CRB XE274H-10
Computer-Controlled Compatible:
No
Lifters Included:
Yes
Lifter Style:
Hydraulic 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 non-roller
Assembly Lubricant Included:
Yes
Pushrods Included:
No
Rocker Arms Included:
No
Gaskets Included:
No
Valve Springs Required:
Yes
Quantity:
Sold as a kit.
Notes:
Pre-1968 engines require different lifters.
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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