F@#k the thumprs
Stay away from any thumpr I used mine for only 1400 miles swiped 6 lobes flat.
Donn't gofor sound go for the power and torque forget about the idle its a bonus. Sent the cam back to comp and told them to take it back to China.
Not only myself 6 customers can vouch for that. What are your goals and the specs on your motor how radical do you want to go and what rpm range and stall?