I know you're limited with the rims Gunna, but I did the OEM brake upgrade with braided lines slotted rotors etc first and it was a fail on track. If I was you, I'd just run some QFM A1RM pads and decent fluid (which you'll need to bleed after the track day) and, run some good old fashioned brake ducts on the fronts. Will save you poo loads and give similar performance. The harsh realty is, two piston calipers just won't pull up 1800 kegs of barge without cooking their guts on a track day. My 4 piston Brembos with T3's and PBR upgrade rears JUST gets it done. By just I mean fluid is cooked, pedal turns to mush and I need to bleed the brakes after every track day. I'm actually looking at incorporating some ducting on mine also.