I am thinking about straight piping my truck. (F-150) Does this add any power or reduce my gas milage? Thanks

 

true dual straight pipes wtih no mufflers can increase your torque a little provided you use the correct pipe diameter size. Too big of pipe will provide too much free flow and reduce torque. 2.5" pipe all the way out should be fine, 3" would be a bit big unless your engine is really modded. It would make it sound awesome if its a V-8--ive been considering cutting off my catback and puttin 2.5" all the way out