Long time lurker first time poster. I have been looking into upgrading the exhaust on my bike. Been trying to find something used but having a tough time, and a little confused. What year ranges will fit my bike? Seems one system says 89-94 then the next will say 85-2006. Been looking at 2into1 systems and longshots, big guns. Something in that area. Any help will be appreciated. Or if you have something for sale. Let me know.