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Technical Articles for Part Number CCA-12-855-9
COMP Cams Oval Track Camshafts
Camshaft, Oval Track, Mechanical Roller Tappet, RPM Range 3,000-7,200, Advertised Duration 281/285, Chevrolet, Each
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Estimated Ship Date: Oct 27, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
12-855-9
Part Type:
Product Line:
Summit Racing Part Number:
CCA-12-855-9
UPC:
036584015369
Cam Style:
Solid roller, Retro-fit
Camshaft Use:
Circle Track
Camshaft Manufacturers Description:
331-355 Limited LM, 2 BBL and 390 4 BBL carburetors.
Basic Operating RPM Range:
3,000-7,200
Intake Duration at 050 inch Lift:
253
Exhaust Duration at 050 inch Lift:
257
Duration at 050 inch Lift:
253 int./257 exh.
Advertised Intake Duration:
281
Advertised Exhaust Duration:
285
Advertised Duration:
281 int./285 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.645 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.645 in.
Valve Lift with Factory Rocker Arm Ratio:
0.645 int./0.645 exh.
Lobe Separation (degrees):
106
Camshaft Gear Attachment:
3-bolt
Remanufactured:
No
Computer-Controlled Compatible:
No
Grind Number:
CS 281TK-R6
Valve Springs Required:
Yes
Quantity:
Sold individually.
COMP Cams Oval Track Camshafts
COMP Cams oval track camshafts are designed specifically for racing applications. They are available to complement a variety of engine configurations, track lengths, and conditions--simply order the model that fits the needs of your particular make and model. Before you start the next oval track race, install the winning camshaft edge from COMP Cams.
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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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