ok i was thinking of doing a secret cam to my car. one thing worried me, its how much MPG will i lose. at the moment i get say 20 city 28 highway and do most my driving in the city. if i add the cams will it tank my cars mpg a lot or just a little. thxs
Honestly mine got a little better, but its all going to be dependent on your driving style and car, so its up to you on what it will do.
my car has them as well as quite a few other performance mods including a tune and usually gets around 32mpg hwy.

In the end, we're all just chalk lines on the concrete.. drawn only to be washed away.
ok so the cams wont kill gas mileage if your drive right that is.