I'm considering replacing my exhaust, headers to tips (5.3L) to try to squeeze out a couple more MPG's, but I'm stuck on a decision.
Do I
A:Go 2.5" because that's what on the truck now
Or do I
B:Go 2" because the header tubes are only 1 3/4"



Do I
A:Go 2.5" because that's what on the truck now
Or do I
B:Go 2" because the header tubes are only 1 3/4"
