i put flowmastes on my 54/3100/235 a month a go and like them very much. i even believe that i got more power also. as far as gas mileage it is hard to tell it is very erratic. btw ihave duals. i bought mine at advance auto and they gave me a 10% discount when i mentioned oriellys across the street. now i work at auto zone. ron
Last edited by WE b OLD; 11/05/2008 4:50 PM.
