Put a stage 3 intake manifold, exhaust, intake, and tune on it and you'll have your own m3 in a way. lighter, more agile and still plenty quick especially with all those bolt ons. You can add headers to that list too if you really want everything you can squeeze out of it.
3 stage manifold, custom headers, AA tune, Injen intake, Custom 135i exhaust fitted to 128 mids, blackline tails, Depo headlights w/ 8000k LED angel eyes and xenons, 8000k xenon fogs, Lowered on eibach springs, m3 lower control arms, 264's in anthracite with a red lip wrapped in hankook v12's in 135i sizes with 10mm spacers all around, rolled front and back, pulled front fenders. plasti dipped a custom blue