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Technical Articles for Part Number CCA-54-703-11
COMP Cams Thumpr Hydraulic Roller Camshafts 54-703-11
Part Number: CCA-54-703-11
COMP Cams Thumpr Hydraulic Roller Camshafts
Camshaft, Stage 2 Thumpr, Hydraulic Roller, 3-Bolt, 282/299 Advertised Duration, 1,800-6,600 rpm Range, Chevrolet, LS, Each
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Estimated Ship Date: Oct 23, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
54-703-11
Part Type:
Product Line:
Summit Racing Part Number:
CCA-54-703-11
UPC:
00036584386438
Cam Style:
Hydraulic roller, OE roller
Camshaft Use:
Street/Strip
Camshaft Manufacturers Description:
HYDRAULIC ROLLER - Thumpr™ lobe design for awesome idle lope in modified 5.3L & 6.0L truck engines. Required high lift valve springs ensure maximum power gains. AFM & VVT delete.
Basic Operating RPM Range:
1,800-6,600
Intake Duration at 050 inch Lift:
227
Exhaust Duration at 050 inch Lift:
237
Duration at 050 inch Lift:
227 int./237 exh.
Advertised Intake Duration:
282
Advertised Exhaust Duration:
299
Advertised Duration:
282 int./299 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:
0.614 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:
0.612 in.
Valve Lift with Factory Rocker Arm Ratio:
0.614 int./0.612 exh.
Lobe Separation (degrees):
113
Camshaft Gear Attachment:
3-bolt
Remanufactured:
No
Computer-Controlled Compatible:
Yes
Valve Springs Required:
Yes
Quantity:
Sold individually.
Notes:
Requires high-lift valve springs, AFM and VVT delete are required.
COMP Cams Thumpr Hydraulic Roller Camshafts
COMP Cams has awakened the muscle car sound--and it is nastier than ever! Thumpr Series camshafts is a line of cutting-edge hydraulic roller camshafts for engines originally equipped with flat tappet cams. With them, you can expect a substantial power increase without sacrificing reliability or ease of maintenance! The lobe profile and grind characteristics of Thumpr cams include blending an early exhaust valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap. This maximizes rough-idling tendencies, delivering a seriously aggressive exhaust note without affecting engine power output. Thumpr camshafts are available in a variety of grind profiles, each producing impressive horsepower and torque performance within a different rpm range.
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Some parts are not legal for use in California or other states with similar laws / regulations
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