One thing to try and find for the interior is the GXP interior parts, like the chrome vent rings and door handle cups, aluminum pedals, aluminum door handle inserts, and the GXP gauge cluster all look much better than the n/a interior. If you have the motivation, you can also replace the factory shifter with a leather shift boot and aluminium knob... Those always look better than plastic.

Also there's the exterior upgrades, like the se front lip, the inferno hood, spo spoiler and grill, retrofit headlights, so on and so forth.

On the matter of tinting the tail lights, and lowering as well, some are for it, some are against it, some think it's a waste of time and energy but still say it looks good, make your own decision.