89f150drvr

will having straight pipes effect gas mileage? would i be better off with mufflers?

1996 Redneck F150

i've never heard of straight pipes affecting gas mileage.... i always straight pipes let the engine breath better resulting in better performance....

sloney76

Are the headers after market and is it a custom exhaust? Just wondering if the O2 sensors were put back on after the exhaust was modded. My buddy removed his O2 sensors when he made his own exhaust and never put them back on and it killed his gas mileage

89f150drvr

the o2 is in the original spot, its custom duel off the y-pipe

|WYG|SS

do you still have cats. on the truck? but yeah it shouldnt affect you mpg. the only reason ur buddy get bad mpg cause his o2 sensor is not reading. tell him to find a spot to put it on the exhaust or he can also purchase kits to put the o2 sensor back in the exhaust

atvrider93

what size piping? how far back does the pipe go?

sloney76

Thanks for the advice, i would let my friend know if he hadn't rolled that truck and totaled it a couple years back. I think he was just too lazy to weld in some bungs and replace the O2 sensors.

89f150drvr

2in to 2.5 dumps infront of back tires, if you look at my pics you can see where it comes out

95stepside

the only way that it makes your gas mileage for the worse is that you will like the sound more and stay on the gas more to hear it lol