I have the White Brothers complete exhaust, I was wondering if I have to have it rejeted again after installing it and will it rob me of any horsepower? Thanks for the help.

 

Anyone?

 

I think since you have the complete system (headpipe and silencer) you have to rejet. I have the pro design intake/filter kit and the e-series slip on and I rejetted with the stage 3 kit. I couldn't believe the power increase I got from these add-ons. I did all this 3 months ago and haven't had one problem. If I were you, I'd spring for the pro design kit.

 

I am not sure what you mean by "rejetted" if you did not already change jets then jetting is the thing to do. but to get the most out of it you should upgrade your airfilter (prodesign w k&n is a good choice), modify your airbox (no lid works best if you are not worried about mud and such) and then rejet, its the complete system that gets ct racing the close to 50hp's they get on theirs not just the pipe, you can do the same thing with the WB system and probably get in the 45+hp range out of it

 

I did jet it after I put on the wb exhaust and I wont be modifying the airbox none. I didnt know if the quite core insert would make a diff after I had that other done or not.

 

sorry for the misunderstanding no jetting changes needed for just a core change on your silencer, and yes it may cut back the hp's but probably not enough to notice

 

Thanks and one more thing how do u put these things on?