Very rough idle. Biggest cam for stock heads. Great power above 4,900 rpm. Compatible with stock valve springs. Benefits from converter and gears. Requires cam phaser upgrade and custom tuning.
Basic Operating RPM Range
750-6,600
Intake Duration at 050 inch Lift
234
Exhaust Duration at 050 inch Lift
254
Duration at 050 inch Lift
234 int./254 exh.
Advertised Intake Duration
273
Advertised Exhaust Duration
306
Advertised Duration
273 int./306 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
MT273LL-9
Valve Springs Required
No
Quantity
Sold as a pair.
Notes
Mutha' Thumpr, designed to fit SOHC modular 3V engines.