RAAAAH

Im thinking bout getting these ppe headers, but i want to know how itll affect gas mileage. does anybody know the mileage with stock headers vs ppe headers? i got a 07 is250 manual transmission with m2 axel back and invidia midpipe

if someone has the same or similar set up as mine id like to hear what you thought about the difference in sound and performance.

Gville350

iTrader: (10)

If you're wanting headers, the last thing on your mind should be fuel mileage. They're a performance part that is well-known on the forums here. They're a quality set and sound great with the right setup.

Fuel mileage though is wholly based on whether you can keep your foot off the loud pedal...I know I can't in my IS350.

flattire

How does the m2 performance axle back sound with those mid pipes? I have the m2 axle back with a resonator delete and I was thinking of getting something with less drone at 1k-3.5k rmps.

laobo979

iTrader: (5)

Doesn't change much unless you have a heavy foot haha.. I have the 350 and if I do all HW I can get 31mpg average. Also 24 city durning summer season.

Jump2man3

iTrader: (7)

Like Gville said if your worried about gas mileage maybe headers isnt for you. I got headers and prolly get less miles to gallon but only cause I enjoy the sound lol