I have an 07 sp 500. I would like to add an exhaust. what is the best.

 

There's not as much out the for this ATV compared to, lets say, a Ninja 6R or other sportbike. I don't think you would gain much if anything with a full system on the 500, I'd just look for a slip on muffler.

Supertrapp makes one call the IDSX, I just put one on my 800 and like it a lot. I think what exhaust is "the best" depends mostly on individual opinion.

 

thanks. what about a aftermarket cdi box or efi controller.