THUMPR™ CAMS by Comp Cams

Thumpr cams deliver incredible exhaust lope and impressive performance. Comp Cams designed the Thumpr series of camshafts to deliver the meanest-sounding idle on the block, but without skimping in the horsepower department!

Available in retro-fit hydraulic roller and hydraulic flat tappet for carbureted Small and Big Block Chevy, Ford 351 Windsor, LS engines, Ford 4.6/5.4L Modular 3V engines, Small Block Chrysler, as well as Small Block Chevy factory hydraulic roller blocks. Thumpr Camshafts are availabe in three different grind profiles for each engine, all of which will produce a rough, racy exhaust note and impressive amounts of horsepower and torque.
CHECK OUT a sample of the Thumpr Grinds available below!

RETRO-FIT HYDRAULIC ROLLER CAMSHAFTS
Small Block Chevy 262-400, 1955-1998 Non Factory Roller Block
Application/ Camshaft Valve
Setting		 RPM
Operating
Range		 Camshaft
Part
Number		 Cam
Grind
Number		 Duration
Adv.  
Duration
@.050"		 Valve Lift
@ 1.7:1		 Lobe
Sep.
Angle
IN. EXH. IN. EX. IN. EX.
Thumpr™ - High performance street, stock converter ok, best with 2000+ converter and gears, choppy/thumping idle Hyd 1900-5600 12-600-8 283THR7 283 303 227 241 .513 .498 107°
Mutha' Thumpr™ - High performance street/ strip, needs 9:1 CR, 2500+ stall, intake, gears, and headers, rough idle Hyd 2200-5900 12-601-8 291THR7 291 311 235 249 .522 .509 107°
Big Mutha' Thumpr™ - Street/strip, needs 9.5:1 CR, 2800+ stall, intake, gears, & headers, very rough idle Hyd 2500-6200
 12-602-8
 299THR7
 299
 319
 243
 257
 .533
 .519
 107°
Even the mildest Thumpr cam profile produces a significant increase in Torque and Horsepower!

Click Here to view a Video of the Thumpr cams in use.