to touch tens can be done pushing stock stuff , upgraded turbo ,injectors,fuelpump and a good understanding of your tune and a means of changing it (good relationship with your chip maker or aftermarket ecu like DFI fast XFI BS3)
but 10s all the time and at a track and be somewhat prepared for the abuse you are about to put your car to so as to have something to drive back home
gauges and monitors for KR , and logging (DS,powerlogger) , the more data the better you can tune for better performance and address troubles before it becomes fatal to the car
aftermarket axles , c-clip eliminators , wheel studs, HD eaton posi or spool
hd driveshaft , joints and yokes
SFI flywheel
SFI balancer
fire jacket
rollbar (5 point at least) , 5 point harness
steel screw in valve stems
trans sheild
traction devices (sticky tires be it MT drag radials or slicks , rear swaybar , control arms , shocks )
brake upgrades to hold the boost or a transbrake
air intake upgrades
exhaust upgrades since most organized events require a chambered mufflered system
and say a prayer before every launch