Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Which has better flow and gives more HP behind rear wheels or straight back out past the rear bumper? What do mean by turn downs?
I dont think MPG's will even play a part with either. As for turn downs, that means, more or less, that immediatly after the muffler, cat, or what have you, short tail pipe extentions are put in place instead of running piping to a preconfigured location.
I'm talking about horsepower not mpg.