i have a 450r with an hrc kit does anybody know what exhaust would give me more overall performance

 

The sparks full exhaust is fairly common on the 450r. I have the sparks pipe, hrc kit and open airbox. I had the HRC kit before I put the sparks pipe on and it helped quite a bit. Be advised, it is very loud. Hope this helps.

 

We have a riding buddy that made a straight drag pipe for his 450R and it surprisingly worked. It was not pretty and is very noisy but it gave his quad excellent top end. With a little R&D he just might have something worth marketing. This won't be for trail riding by any means. If interested take a look at this site for ideas. Burns Stainless Steel Pipes