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Technical Articles for Part Number CCA-12-601-20
COMP Cams Thumpr Pro-Plasma Nitrided Camshafts 12-601-20
Part Number: CCA-12-601-20
COMP Cams Thumpr Pro-Plasma Nitrided Camshafts
Camshaft, Hydraulic Flat Tappet, Advertised Duration 287/305, Lift .489/.476, Chevy, 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:
12-601-20
Part Type:
Product Line:
Summit Racing Part Number:
CCA-12-601-20
UPC:
036584177937
Cam Style:
Hydraulic flat tappet
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
HYDRAULIC - Mutha' Thumpr™ - High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.
Basic Operating RPM Range:
2,200-6,100
Intake Duration at 050 inch Lift:
235
Exhaust Duration at 050 inch Lift:
249
Duration at 050 inch Lift:
235 int./249 exh.
Advertised Intake Duration:
287
Advertised Exhaust Duration:
305
Advertised Duration:
287 int./305 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.489 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.476 in.
Valve Lift with Factory Rocker Arm Ratio:
0.489 int./0.476 exh.
Lobe Separation (degrees):
107
Camshaft Gear Attachment:
3-bolt
Remanufactured:
No
Computer-Controlled Compatible:
No
Grind Number:
287TH7
Valve Springs Required:
Yes
Quantity:
Sold individually.
COMP Cams Thumpr Pro-Plasma Nitrided Camshafts
COMP Cams Thumpr flat tappet Pro-Plasma nitrided camshafts offer performance and extreme durability. Three unique cam designs--Thumpr, Mutha' Thumpr and Big Mutha' Thumpr--deliver excellent horsepower gains, broad torque curves, and improved surface hardness for your muscle car and street rods. Pro-Plasma nitriding introduces nitrogen into the cam material for improved initial and long-term wear characteristics. It's the best way to increase the hardness and lubricity of Thumpr flat tappet cams. Don't be blinded by the shiny cam finishes--choose race-proven COMP Cams Thumpr Pro-Plasma nitrided camshafts.
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Some parts are not legal for use in California or other states with similar laws / regulations
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