it will effect ur fuel consumption a little bit laa.. not to say it wont affect at all, it will all depend on ur setup and the design of the muffler and bullet.. dont bother bout the FC if u r hunting for power.. ur heavy foot will contribute more effect than the exhaust system..
Anyone can give opinion on 3 Garrett turbo series, Garrett GT 28R, GT28RS aka Disco Potato and Garrett GT30R. Anyone have real life advise on those and how much those turbo cost in the market?