Since I seem to post this information on the web over and over I figured I'd solidify it here.
The following information is how Andy and I run my 2003 Nissan 350Z Enthusiast model in SCCA Solo Competition in the B Stock Class.
Shocks
DA Konis available from Nissan USA Motorsports Division
(SA Konis in the garage just in case Full Stiff (r))
Front Sway Bar
Hotchkis (full stiff)
Exhaust
Removed the stock muffler, drop 35lbs, put a pipe to aim exhaust down and out from under the car.
Brakes
Hawk HP Plus(F) HPS (R)
Wheels
Enkie
Spacers up front
Tires
Kumho 710s, 275 45(or were they 40) 17
Tire Pressure 36-37 (f) 31-32 (r)