Originally Posted by bottlefedLX
When you add your performance parts, you compromise gas mileage for the most part, although this is not always true.
Actually, in many cases you can have increased both. If you turbo your car, intake, exhaust, intercool, you'll have more power at the same point as before, so you dont need to rev as much to get around. This is why my friend's MX-3 sucks ass at gas mileage...in Sarasota traffic, you need power to get around