Little breakdown..
Active Tuning 4-Wire Grounding Kit - $40
Injen Race Division (RD) Cold-Air Intake (CAI) - $250
Crawford Equal-Length Headers - $1150 OR Nexus Equal-Length Stainless-Steel Headers - $675
Nexus Test Pipes - $380
Unorthodox Racing Underdrive Pulley Set (with belts) - $329
Borla Cat-Back True Dual Exhaust OR Injen SES True-Dual Cat-Back Exhaust OR Stillen True-Dual Cat-Back Exhaust - $699 , $860 , $1,295 (respectively)
Crawford Cast Upper Intake Plenum [with or without Nissan OEM lower intake plenum] OR 350EVO Intake Manifold - $350 [plus $222 for Nissan OEM lower intake plenum] , $800-1200 [just a guess since it hasn't been released] (repectively)
Tomei [268 /Exhaust: 10.5 / Intake: 10.5] Camshafts - $1,179
JWT Flywheel OR JUN Flywheel - $769 , $425 (respectively)
ProFlow Throttle Body - $230
NGK Iridium Spark Plugs - $59.70
Total: $4,838.70 to $6,881.70 before installation of anything, and with no tuning.
Now, with tuning, it would be:
I-Speed ECU OR Technosquare ECU Reflash - $1,000-1,200 , $495 (respectively)
Total: $5,333.70 to $8,081.70 before installation of anything.
Have you gotten close to 300rwhp but haven't touched it just yet?
You may want to consider the following modifications:
Moroso Fuel Super Cool Can - $91.95