Originally Posted by
mark-rc
Hey houston, Please could you explain what/how pipe and header setup affect fuel mileage, 'e,g Low end pipe long header = more fuel mileage?',
Thanks.

sounds like you got it already , the upper end pipes release the upper rpm's of an engine and expell more fuel by doing so . the low end pipes restrict the high rpm range of the engine and make it run more efficiently creating better fuel mileage . port designs and throttle finger have alot to do with it also