i called a local exhaust shop today to find out if they could do the custom bending on the piping for my apex n1 exhaust muffler. they said yes, but they use single side piping or something. apposed to doulble like what would have been on my crx stock. they said you can only bend single side piping. he also said that the difference what the amount of heat increase inside the cab. does anyone know what he was talking about and if so, is this a big deal? or is he just full of shit?