Im planning on doing a custom exhaust, from the headers back with no cats. does anyone know the flange size for the headers so i can match the diameter of the pipe. i was thinking of doing a 2.5 going more than that will be a waste. there is a local shop next to my office that will do all the piping for $176. thats with cutting/welding and i will provide a muffler. what do you guys think?

 

mandral bent? if not dont get it

 

they said something about a soft bend. and its aluminum

 

soft bend = no

mandrel all the way, thats a true exhaust system

 

you will drop hp if it isnt mandrel it makes ripples similer to the ripples on the stock intake and makes more back pressure and you dont want to mutch of that

 

what are most cat back pipes made out of? stainless steel?