It doesn't sound like he's performance minded, considering he slapped 16"s on a stock civic. He just said "mods" in general.

One suggestion, (I'm guessing on the type of style you're going for) is to remove the resonator of the intake. It's FREE (if you do it yourself) and it makes your car sound like a monster. VVVRRROOOOMM! I did it just before installing my CAI and it felt like I lost a little power, but it SOUNDED like I gained tons of power.