I put a K&N power kit on my griz,now would putting a pipe on make a power difference? I would like to get a whole new exhaust system but is it worth it?

 

According to Dirt Wheels (1999 issue) putting a Supertrapp on gives you another 2HP.

 

is that just the muffler or is that the whole pipe system?

 

I have the Highlifter Performance kit on mine which includes the Supertrapp. The Supertrapp does not come with the headpipe. Is it worth it? I don't really think so, I primarily bought it because my stock pipe was so rusted out and had an exhaust leak. It almost seems like I lost some low-end torque in low gear. High gear seems better now, I don't have to use low as much now. One thing I really do like about it, is that it flows a lot better, which means a smoother ride with less vibration from the motor.