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..
a few month ago i was bought the afc 5 button from one of forummer here...but till now i still not able yet to install it into my car..the problem is because i dont know the point from the harness(each color) to the...
scenario: after a minor upboost, on max throttle, max boost at 4500 rpm misfiring happens ...can hear crackle noises at the downpipe.... but it only happens at the rpm point not before...