check fabspeed.com as they usually have install directions posted right w/ the specific product. Otherwise, using the search function I'm sure you'll find some tips here as exhaust mods are covered fairly often.
As for torching bolts... in order to hopefully avoid doing so, you'll want to hit them w/ PB Blaster, Liquid Wrench or WD40 (at the very least) for a number of consecutive days prior to your install attempt.
Good luck
