back pressure on stock CAT and Muffler
 

which one of them create most back pressure?

1) stock CAT
2) Stock Muffler
3) piping


Because i want to remove either one of them as i don't want lost too much back pressure

I would say Muffler, Stock Header, Cat, Piping in hat order from the worse to the better...Check my post here!https://www.fitfreak.net/forums/fit-exhaust-systems/47856-axle-back-vs-catback.html!

I'd say the piping. I have my stock midpipe in my coat closet in my apartment and every time I look at it I go :confused: :rotfl:


The piping is like < 1.75" ID and there's so many bends it looks like a 2 year old made it. You'd probably have trouble using it as a drinking straw.


Not that the L15 flows a whole lot of air in stock trim anyway, but that is easily fixed with a little turbine goodness.