have pro 5 pipes off 650 indy bored 711 145 hp pro stock bodyputtin 800 moter in it 711 moter revs 10 000 rpmbody weihts 275 pounds had pipes on sounds ex 800 had low rev pipes 8200 dynoport pipes got to try both cluches like to rev 9500 doint no witch rpm wood be best any surrgistion