About f150 exhaust?

Question

how much horsepower will it add if i install a borla exhaust and some headers on my f150 2003 with the 5.4....will i lose gas mileage or will it increase

Answer 1

gas should be about the same...just a little better depending on your driving. Horsepower should be about 15-25. I put exhaust on mine and noticed my mpg drop but only because Iike the new sound and wanted everone to here me lol...once I got over it I drove normal again and now I average about .5-1 mpg better than before exhaust. However if you go with the headers without the EGR your milage will deffinately drop. But you can expect aprox1-2 more hp over the headers with a spot for your EGR.

Answer 2

lose gas....no idea on the horsepower