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Technical Articles for Part Number CCA-127030
COMP Cams Thumpr NSR Modular 3V Camshafts
Camshafts, Hydraulic Roller Follower, Advertised Duration 281/314, Lift .450/.450, Ford, Modular V8, 3V, Pair
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Estimated Ship Date: Oct 28, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
127030
Part Type:
Product Line:
Summit Racing Part Number:
CCA-127030
UPC:
036584192381
Cam Style:
SOHC
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
BIG MUTHA' THUMPR™ - Extremely rough idle, needs stroker motor and/or ported heads. Major hp gains to 6,800 rpm. Best with 3.73+ gears and 2500 stall. Compatible with stock valve springs. requires cam phaser upgrade and custom tuning.
Basic Operating RPM Range:
750-6,800
Intake Duration at 050 inch Lift:
242
Exhaust Duration at 050 inch Lift:
262
Duration at 050 inch Lift:
242 int./262 exh.
Advertised Intake Duration:
281
Advertised Exhaust Duration:
314
Advertised Duration:
281 int./314 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.450 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.450 in.
Valve Lift with Factory Rocker Arm Ratio:
0.450 int./0.450 exh.
Lobe Separation (degrees):
109
Remanufactured:
No
Computer-Controlled Compatible:
Yes
Grind Number:
BT281LL-9
Valve Springs Required:
No
Quantity:
Sold as a pair.
Notes:
Big Mutha' Thumpr, designed to fit SOHC modular 3V engines.
COMP Cams Thumpr NSR Modular 3V Camshafts
COMP Cams Thumpr NSR modular 3-valve camshafts for Ford 4.6L/5.4L engines deliver an aggressive "thumping" exhaust idle and generous power gains in the middle and upper rpm range. They will turn your Ford 3-valve engine into a performance machine with a minimum of installation difficulty; they only require the addition of COMP Cams cam phaser limiter kits and computer tuning. These cam phaser limiter kits safely modify the factory variable cam timing (VCT) system, allowing for the use of aggressive camshaft lobe technology without sacrificing the benefits of the VCT. Choose between three unique cam designs—Thumpr, Mutha' Thumpr, and Big Mutha' Thumpr. Each delivers excellent horsepower gains and broad torque curves for your musclecar.
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