Hmmm I think that can release exhaust pressure rather than just focusing on one outlet. Looks like inefficient to me (my opinion). It's always best to imitate the exhaust flow of powerful NA cars. Follow their concept and you should be able to make some horses roar/tyres burn hahahaha.. Btw are you using any tuner? Piggyback or just remap?


but just ignore it haha u went to ah sin 4th mile dy?