I took these pics of my exhaust system. It came like this from Japan. First is the cat, and i'm not sure what it is but i'm guessing its a high-flow (or at least better than stock), and following it is this ugly muffler, before getting to the stainless canon at the end.
My questions are:
Does the exhaust look 3-inch?
Is that cat high flow?
Should i turf the muffler and get a straight pipe?
Lastly, from cat to turbo is stock piping...is it urgent to chuck that for a 3 inch dump+front pipe setup, on a stock turbo?
Thanks for the advice.