Things I forgot:
2000 civic Si strut bar
$10 from a guy that I was buying an engine from.
Noticed a small different, but on an S (no front sway bar) it can't be the much of an improvement.

5% tint
cost 30 bucks
Did it myself the same way Motochip did. Took an afternoon to take out all the glass and get it back in. It was well worth it, until I got a fix it ticket for being WAY darker than legal.