Hi guys, I saved up some money and ready to go hunting for my exhaust system. I have a 2007 BF MII XR6T, no mods on it atm (behind uni and work has been hard to dedicate time to mods) It has the ZF transmission. In terms of power I'm looking to reach somewhere around the 350 rwkw range. Basically mods I'm trying to gather are; intercooler (stage 2 most likely) tune+injectors fuel pump and depending on interceder piping etc relocation of battery etc Now with the power range I'm looking for I'm unsure of what exhaust system I should get. Mild or stainless (I heard mild is cheaper and louder, may be wrong) 3.5" or 4" inch dump (are there any pros/ cons for the power I want?) Quad or duel system (I love the look of the quad, but is there any difference between this or the duel other then probably sound?) If dual is the way, do I get twin dump? Help would be appreciated, thanks guys!