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Technical Articles for Part Number CCA-12-817-9
Camshaft, Mechanical Roller Tappet, Advertised Duration 307/320, Lift .739/.739, Chevy 1957-98 Small Block, Each
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Estimated Ship Date: Oct 23, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
12-817-9
Part Type:
Product Line:
Summit Racing Part Number:
CCA-12-817-9
UPC:
036584081623
Cam Style:
Solid roller, Retro-fit
Camshaft Use:
Drag race
Basic Operating RPM Range:
4,500-8,500
Intake Duration at 050 inch Lift:
274
Exhaust Duration at 050 inch Lift:
282
Duration at 050 inch Lift:
274 int./282 exh.
Advertised Intake Duration:
307
Advertised Exhaust Duration:
320
Advertised Duration:
307 int./320 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.739 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.739 in.
Valve Lift with Factory Rocker Arm Ratio:
0.739 int./0.739 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:
307RXD-12
Valve Springs Required:
Yes
Quantity:
Sold individually.
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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