I'm looking to get a set of decker twin pipes. The only thing is that they came off a zr700 that was bored out to a 800. I did a search on decker pipes and found pipes for a 700 arctic cat. These should still work right? Also they run at 8400-8500 rpms. On the black magic site there twin pipes run at 8400 rpms. Really need a set of twins fast. Please help. Thanks Louis.