COMP CAMS CAMSHAFT LS1 275T THUMPER Camshaft – 5460011

GM LS Thumpr Cam – 275THR


SKU BDQQ54-600-11
Part Number 54-600-11
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Camshaft; Thumpr ™; GM LS Gen III/IV Three-Bolt; Hydraulic Roller; 2000-6400 RPM Range; 219 Degree Intake Duration @ 0.050 Inch Lift; 233 Degree Exhaust Duration @ 0.050 Inch Lift; 0.553 Inch Intake Valve Lift; 0.536 Inch Exhaust Valve Lift; 109 Degree Lobe Separation

The Thumpr™ Camshafts are a series of hydraulic flat tappet & hydraulic roller Camshafts that are now available for most popular applications, carb & late model EFI. The reason that the new Thumpr™ Camshafts have such an aggressive exhaust note is that the lobe profiles & grind characteristics chosen by the COMP Cams(R) engineers produce a combination of early exhaust Valve opening, long exhaust duration & a generous amount of intake & exhaust overlap to maximize the rough idling characteristics of the cams without negatively impacting the power output or streetability. Thumpr™ cams deliver incredible muscle car sound & a new level of streetable performance.

Engine Compatibility: GMC Gen III LS Engines
Recommended Use: Mild Street Performance To Mild Race
Type: Hydraulic Roller
RPM – Low: 2000
RPM – High: 6400
Intake Duration At 0.050 Inch Lift (DEG): 219 Degree
Exhaust Duration At 0.050 Inch Lift (DEG): 233 Degree
Advertised Intake Duration (DEG): 275 Degree
Advertised Exhaust Duration (DEG): 295 Degree
Intake Valve Lift (IN): 0.553 Inch
Exhaust Valve Lift (IN): 0.536 Inch
Lobe Separation Angle (DEG): 109 Degree
Intake Centerline Angle (DEG): 103 Degree
Grind Number: 275THR9
Computer-Controlled Compatible: No

– Available In Both Hydraulic Flat Tappet & Hydraulic Roller Designs For Most Popular Applications, Carb & Late Model EFI
– Three Unique Grinds For Each Engine To Fit All Cruising & Street Performance Needs
– Long Exhaust Duration & Other Grind Characteristics Produce A Powerful, Hard Hitting Exhaust Note
– Designed For Use With The Latest In Valve Train Component Advancements Such As Beehive™ Valve Springs, Pro Magnum™ Roller Rockers & Magnum Pushrods
– Limited 1 Year Warranty


Weight 9.92000 kg
Dimensions 3.10000 × 24.10000 × 2.70000 cm

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