response: most of my customers go for slotted front rotors cause their sick of maching and replacing for BRAKE SHUDDER common in these models especially in higher power situations which means heavier braking causing excessive heat disperition in rotors mainly in fronts due to R.W.D. being 60:40 brake distribution
as for removing excess weight will only make a difference if already at VERY high end power numbers as at low end is like fust advancing timing VERY MINIMUL gains but if you want a fifth of a second YES, and yes in queensland you can be defected for no spare tyre but only if you didnt throw it out yesterday cause of a flat... that you'll get fixed tomorow