is there any moding i can do to my mojave exhaust to make it perform better or louder.(louder or lower sounding). the bolt seems to be welded to the spark arrester.

 

bump

 

I put a DG ChromePower header & Muffler (if you want to call it that) on my stock 01 mojave. Went 2 sizes larger on main jet and gained Better torque and acceleration across powerband. I'm warning you, though, that exhaust has NO restriction and is VERY LOUD!