Did your gas mileage drop after the install of your loudmouths. Either that or the 1.6 rockers I installed dropped mine 3 mpg and about 45-50 per tank. I would've never thought that either of those two mods would have had that profound of an effect on gas mileage like it did. Anything I can do tunewise that will pick it back up some, believe me with the gas prices this high, a reprogramming will pay for itself over time.

 

i think i actually gained gas mileage

i was usually getting 17-18 before the LM, but just last week i got 19mpg

keep in mind of how many different driving conditions can effect the MPG (weather, gear, traffic etc.)

 

I think the only reason mine is worse after the install is because I tend to let it rev higher so I can listen to it