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Instruction Sheets for Part Number CCA-12-683-5
Technical Articles for Part Number CCA-12-683-5
COMP Cams Oval Track Camshafts
Camshaft, Mechanical Flat Tappet, Advertised Duration 274/278, Lift .468/.468, Chevy, Small Block, Each
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Estimated Ship Date: Mar 30, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
12-683-5
Part Type:
Product Line:
Summit Racing Part Number:
CCA-12-683-5
UPC:
036584070504
Cam Style:
Solid flat tappet
Camshaft Use:
Street/Strip
Basic Operating RPM Range:
3,200-6,800
Intake Duration at 050 inch Lift:
248
Exhaust Duration at 050 inch Lift:
252
Duration at 050 inch Lift:
248 int./252 exh.
Advertised Intake Duration:
274
Advertised Exhaust Duration:
278
Advertised Duration:
274 int./278 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.468 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.468 in.
Valve Lift with Factory Rocker Arm Ratio:
0.468 int./0.468 exh.
Lobe Separation (degrees):
107
Intake Valve Lash:
0.014 in.
Exhaust Valve Lash:
0.014 in.
Remanufactured:
No
Computer-Controlled Compatible:
No
Grind Number:
CS 274L312 S7
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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