[isugoo]

Any 20" wheel upgrade will cost you 1.3k and if you're going to lower it, let's say 1k. then it's more like 5k upgrade.

More direct steering wheel is def. worth it in my opinion but still it's a lot of money.
And I don't think exhaust is not really noticeably louder either.

So if you like to drive aggressively and maybe take it to track a few times to maximize extra 15 hp, upgraded MDM and suspension setup, you may get your money out of revise suspension and MDM etc., but if not, it's still 5k upgrade for things you'll not use.