Quote Originally Posted by Maddawg View Post
How about a little more feedback about the mileage improvement now that you have over a year and a half usage since the installation. My neighbor installed a cold air intake and Magnaflow exhaust system on his Chevy truck. Big performance improvement and gas mileage too he said. Seems like when performance goes up, mileage goes down. But what do I know? Thats why I'm asking.
you are correct - its simple physics of an internal combustion engine - the more air you can get in and out of the system (i.e. an intake /exhaust) the more fuel you can and will burn - no doubt about it

also, if you have an intake without the proper exhaust to compliment it or vice verse they dont do much if any good except maybe change the sound it makes