if its just a STOCK 350sbc, running an xpipe can actually hurt performance. if you look up on youtube "xpipe vs hpipe" there is a good video about how the xpipe scavenges the exhaust and how it can help or hinder. i have an old set of flowmaster series 40 mufflers, off brand fbody 1-5/8" headers with 3" collectors, pypes x pipe system and it sounds pretty badass... so have you bought an exhaust system yet or decided which one you are going with?
