Hello to everyone. I have a question according to the fuel consumption. Now i have stock exhaust and the consumption is about 5.4 lts/100 km on the highway and about 7 lts in town. I want to change exhaust either to Cobra or to V&H. The question is: what fuel consumption i should expect on both exhaust. Maybe there is somebody who has cobra or v&h installed on your m50. And is it necessary to put any kind of fuel controllers? Thanks.