i recently picked up a set of FMS headers to compliment my o/r h pipe. I was talking to a mustang guy who said i need to get better header bolts, where the head of the bolt is thinner (i think). Could somebody direct me in getting the best header bolts for this application? ATM it's going on stock e7's but i plan on going to gt-40 "p" eventuallly. My other question is about sound, will better shorty headers lower the tone of the exhaust, make it louder or what? Thanks for all the help.