a few 'attainable mods,' i believe would help on top of all our other bolt-ons)
slicks, IPT valve-body upgrade, 12lbs racing buckets, battery relocation to rear hatch, drain windshield wiper fluid, empty gas tank as low as possible or install a fuel cell, lose bodyweight, resonator delete and cat delete also sheds quite a bit of weight as well.
you can also remove your hood on track day!!!
carbon driveshafts can be made for our car too, there is a thread on this somewhere on here.
i'll keep trying to remember more. shedding enough weight on our cars could be effective in attaining those consistent numbers.
the high stall torque converter i had just made my SRT spin on it's butt all day. even on slicks, i heard the same. the supercharger kicks in so much power down low.