Hi all,<br /> I'm running a 98 Javelin with a VMax 150 plus a rite hite manual JP with a 6" setback. I am considering going with either a 8" or 10", but I'm not sure what performance gains I would get or headaches I may create. I would appreciate any advice on how to decide how far back I can go without causing any performance or structural issues with my craft. Any Ideas?<br /><br />Thanks