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Technical Articles for Part Number CCA-31-603-5
COMP Cams Thumpr Hydraulic Flat Tappet Camshafts
Camshaft, Hydraulic Flat Tappet, Advertised Duration 295/312, Lift .512/.497, Ford, Small Block, Each
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Estimated Ship Date: Oct 22, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
31-603-5
Part Type:
Product Line:
Summit Racing Part Number:
CCA-31-603-5
UPC:
036584212959
Cam Style:
Hydraulic flat tappet
Camshaft Use:
Street/Strip
Basic Operating RPM Range:
2,500-6,400
Intake Duration at 050 inch Lift:
243
Exhaust Duration at 050 inch Lift:
257
Duration at 050 inch Lift:
243 int./257 exh.
Advertised Intake Duration:
295
Advertised Exhaust Duration:
312
Advertised Duration:
295 int./312 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.512 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.497 in.
Valve Lift with Factory Rocker Arm Ratio:
0.512 int./0.497 exh.
Lobe Separation (degrees):
107
Remanufactured:
No
Computer-Controlled Compatible:
No
Grind Number:
295TH7
Valve Springs Required:
Yes
Quantity:
Sold individually.
COMP Cams Thumpr Hydraulic Flat Tappet Camshafts
COMP Cams is bringing the musclecar sound back, and it's nastier than ever! Few things grab our attention at a car show or cruise-in like a thumping, high performance idle. In fact, one of the most frequent questions from customers is, "What camshaft will give my car that mean-sounding idle?" For the performance and sound you demand, COMP Cams engineers introduce the Thumpr camshafts—a new series of hydraulic flat tappet cams. The lobe profile and grind characteristics of Thumprs use a combination of early exhaust valve opening, long exhaust duration, and a generous amount of intake and exhaust overlap—to maximize the rough-idling characteristics of the cams. They give you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. Thumpr camshafts are available in several grind profiles; each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range.
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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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