So I searched for this first but didn't come up with anything.
I've been thinking of quick modifications I can make to my MK3 98 GTI
One of the more popular suggestions I've received is a cold air intake. What kind of gains and benefits would I see form this? Better gas mileage? Increase in HP? Torque? Would this be sensible first step in increasing horse power? (I always hear "intake, headers, exhaust") Or is there other things I should do before I undertake this kind of modification?