K&N panel filter
The tallest roll bar I could get that I can still get the soft top over (hard top won't fit).
Kirkey bucket seat custom-mounted to be as low as poss.
Willians 4 point harness
Cusco 1.5 way Limited slip differential
Stiffer springs, though god knows what rating they are.
Adjustable shocks, with 8 settings for rebound. Last track day I had the fronts on '5', rears on '6'.
Firmer anti-roll bars, adjustable on the rear (set to 'oversteer')
A set of BBS alloys with Toyo R888s
I've also had the geo done but I can't remember the exact details... negative camber all round, slight toe-in and increased castor.
Future Planned Modifications
May try the brakes off a 1.8 next and there's a simple timing mod I can get done on the engine apparently. And maybe a fruitier exhaust.