Quote:
Originally Posted by Cyanfall
Excepet warming up, i cannot make sense of why the car wanna close one exhaust even, or especially at eco pro mode. More exhausts means Less back pressure means better fuel economy right?
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Exhaust backpressure has to be balanced. I'm not going to pretend that I understand it, but there is a point where it's more efficient to have a certain amount of backpressure. That's why headers and exhaust design is actually more important than just making big pipes from the car go out the back.