Substance

I am wondering how would stage 1 or stage 2 mods hurt gas milage for in city and highway? And having these mods, would my daily driver turn into track car only?

I would love more power but the car has to be the daily driver for me at the end. about 60 miles highway usage everyday and 20-30 in city.

Jakpro1

Yes it does change.........

gets better. For real!

Pulled around 23mpg highway on the way back from Colorado.

Get around 16mpg ripping around town and I'm pretty aggresive at stop lights.

DJE55

Who cares about miles per gallon. How much could it hurt? My car is a daily driver and it's fine. Do the mods! If you need better gas mileage, buy a Honda.

E.fifty.5

couldn't say it better DJe55!!

with K4 i drive my car daily.

Tony007

Then your car still is probably running rich and will use more gas. With the fuel air ratio optimized, then your car will run more efficiently & it will get a little better mileage due to less fuel being used.