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Technical Articles for Part Number CCA-K42-221-4
COMP Cams Xtreme Energy Cam and Lifter Kits K42-221-4
Part Number: CCA-K42-221-4
COMP Cams Xtreme Energy Cam and Lifter Kits
Cam/Lifter, Valvetrain, Hydraulic Flat Tappet, Adv. Duration 256/268, Lift .453/.456, Oldsmobile V8, Kit
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Estimated Ship Date: Oct 26, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
K42-221-4
Part Type:
Product Line:
Summit Racing Part Number:
CCA-K42-221-4
UPC:
036584067887
Cam Style:
Hydraulic flat tappet
Basic Operating RPM Range:
1,000-5,200
Camshaft Use:
Street/Strip
Intake Duration at 050 inch Lift:
212
Exhaust Duration at 050 inch Lift:
218
Duration at 050 inch Lift:
212 int./218 exh.
Advertised Intake Duration:
256
Advertised Exhaust Duration:
268
Advertised Duration:
256 int./268 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.453 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.456 in.
Valve Lift with Factory Rocker Arm Ratio:
0.453 int./0.456 exh.
Lobe Separation (degrees):
110
Grind Number:
OL XE256H-10
Computer-Controlled Compatible:
No
Lifters Included:
Yes
Lifter Style:
Hydraulic flat tappet
Valve Springs Included:
Yes
Outside Diameter of Outer Spring (in.):
1.494 in.
Retainers Included:
Yes
Locks Included:
Yes
Valve Stem Seals Included:
Yes
Timing Chain and Gears Included:
Yes
Timing Chain Style:
Link belt
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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