I have a 99 trailbazer with aaen pipe and silencer along with a clutch kit. Ever since i put the clutch kit on it clunks every once in a while and it revs slow I installed the kit exactly like the instructions and it still revs slow any help out there on this?

 

Sort of sounds like you didn't get the 1/4 turn done on the driven clutch when you installed the secondary spring.