I have a 150 shot on my 04 and love it....
Homemade CAI kit ($73 total with K&N filter)
TR6 spark plugs ($11) gapped at .038
Walboro intank 340gsm fuel pump ($80 on the net NIB, can usually be found for $125)
Complete NX wet kit with heater $700
Timing Tuner $229 NIB from internet
$1093 in parts and a little in labor and tuning.
Car beats the **** out of LOTS of cars on the street, and before tuning it ran 12.5 @115 with horribly rich AF ratio and stock tune. I bet it will run bottom 12's @ 118mph now. EVERYTHING ELSE IS BONE STOCK down to the tires, plug wires, etc.
I would love to race a magnacharged, procharged, or sts turbo GTO to see the outcome. I know I would kick the **** out of the magna charged car, but should be a good race with the STS and procharged cars. Everything else being stock that is (I know Brents car runs 10's which is very cool).
Can't go wrong with a bottle. My car is so nice to drive everyday, I just couldn't bring myself to do a cam or converter or exhaust. I like it all stock lookingsounding, BUT with about 500 lb ft. torque! I beat a couple of modded 03 Cobra's, lots of LS1's, lots of WRX's that were all hopped up, etc. Hung right with my buddies 03 vette with Vortech supercharger, A4, Yank 3200 stall, Borla exhaust...from a 20 kick it was even with me pulling very slightly...
Do the nitrous first, its cheap and easy, safe as anything if you do it right.