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Technical Articles for Part Number CCA-K21-249-4
COMP Cams Magnum Solid Cam and Lifter Kits
Cam/Lifters/Valvetrain, Mechanical Flat Tappet, Adv. Duration 306/306, Lift .555/.555, Mopar, 383-440, Kit
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Estimated Ship Date: Dec 14, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
K21-249-4
Part Type:
Product Line:
Summit Racing Part Number:
CCA-K21-249-4
UPC:
036584460688
Cam Style:
Solid flat tappet
Basic Operating RPM Range:
3,500-6,500
Camshaft Use:
Street/Strip
Intake Duration at 050 inch Lift:
262
Exhaust Duration at 050 inch Lift:
262
Duration at 050 inch Lift:
262 int./262 exh.
Advertised Intake Duration:
306
Advertised Exhaust Duration:
306
Advertised Duration:
306 int./306 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.555 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.555 in.
Valve Lift with Factory Rocker Arm Ratio:
0.555 int./0.555 exh.
Lobe Separation (degrees):
110
Camshaft Gear Attachment:
1-bolt
Intake Valve Lash:
0.022 in.
Exhaust Valve Lash:
0.022 in.
Grind Number:
306S
Computer-Controlled Compatible:
No
Lifters Included:
Yes
Lifter Style:
Mechanical flat tappet
Valve Springs Included:
Yes
Outside Diameter of Outer Spring (in.):
1.509 in.
Retainers Included:
Yes
Locks Included:
Yes
Valve Stem Seals Included:
Yes
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:
No
Quantity:
Sold as a kit.
COMP Cams Magnum Solid Cam and Lifter Kits
COMP Cams Magnum solid lifter cam and lifter kits are specifically designed for the street enthusiast looking for more power and that Pro Street sound. Whether your choice would be the 270s with low-speed torque and noticeable idle, or the 306s for larger cubic inch engines with tremendous high-rpm power and radical idle, one of the Magnum series cam and lifter kits will fit your engine's needs.
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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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