rpm range range descriptiondescriptioncams valve train 77103 tba 93028lun 93029lun ... a 2400-6400 77103 tba n/a n/a 2800-6600 hydraulicrollerexcellent ho replacement type ... cam with noticeable torque and hp increases ... stock mass-air type injection systems hydraulicroller mild performance street cam ... needs 5 speed or mild stall in 302 cubicinchapplications requires computer ... and headers likes 3.31 and up gearing hydraulicroller hi performancestreet/bracket ... cam needs 10:1 compression minimum increasedinduction system and ... needs 3.55 or more gearing will require computermodifications very strong above 3500 ... rpm hydraulicroller serious street/racecam needs 11:1 ...