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Technical Articles for Part Number CCA-11-721-9
Camshaft, Mechanical Roller Tappet, Advertised Duration 324/332, Lift .775/ .748, Chevy, Big Block, Each
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Estimated Ship Date: Oct 22, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
11-721-9
Part Type:
Product Line:
Summit Racing Part Number:
CCA-11-721-9
UPC:
036584071792
Cam Style:
Solid roller, Retro-fit
Camshaft Use:
Drag race
Basic Operating RPM Range:
5,200-7,500
Intake Duration at 050 inch Lift:
284
Exhaust Duration at 050 inch Lift:
292
Duration at 050 inch Lift:
284 int./292 exh.
Advertised Intake Duration:
324
Advertised Exhaust Duration:
332
Advertised Duration:
324 int./332 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.775 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.748 in.
Valve Lift with Factory Rocker Arm Ratio:
0.775 int./0.748 exh.
Lobe Separation (degrees):
112
Camshaft Gear Attachment:
3-bolt
Intake Valve Lash:
0.026 in.
Exhaust Valve Lash:
0.028 in.
Remanufactured:
No
Computer-Controlled Compatible:
No
Grind Number:
324AR-12
Valve Springs Required:
Yes
Quantity:
Sold individually.
Notes:
Requires thrust button, wear plate, and aftermarket distributor gear. Recommended for 454 cu. in. and larger engines.
COMP Cams Drag Race Camshafts
COMP Cams drag race camshafts are offered in four styles: hydraulic flat tappet, hydraulic roller tappet, mechanical roller tappet, and mechanical flat tappet. These cams are ideal for the performance demands of the dragstrip, as well as street, strip, Circle Track, and other applications. Over a hundred models are available; choose the camshaft designed for your vehicle and engine family.
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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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