• Full exhaust- Header is most gains.. Everything else is just noise.
• Turbo- This should be the last upgrade. Enjoy the car stock. Add power when needs be. when N/a power isn't enough then consider a FI kit. Have you considered any superchargers?
• Brake pads- Stock are fine. Racing brakes creates a lot of dust and will squeak. If you want to have racing brakes I would suggest
and I have heard hawk have good pads. Stainless steel lines are also a good upgrade.
• Coil overs or lower the car- Easily able to spend lots of money here. Do you just want looks or functionality. I have lowering springs with camber bolts and it helps. But wont do the same as coils. Do some research if you want either drop or race. Check out tein's line of springs to coils. They have inexpensive options. Camber in the front reduces the factory understeer mid corner, adding throttle also fixes this.
• Sound System- New headunit. Stock sucks. Probably a sub and amp truely. You could try Oem Audio +. Also would fix the door rattles because when bass hits they will annoy the f*ck outa you.
• Window Tint-35%
• Tires- Michelin pilot super sports. Squared is better than staggered. I think anything over 9 inch wide is too much for this car (n/a of course, FI will prob need more meat.)
• Wheels-personal preferance.
• Intake system- Drop in. anything else doesnt give any gains
• Widebody- not needed
• Bodykit- Up to you.. lips/ addons are cheaper and everything is personal preferance.
Theres lots of information on this forum. Just look through every thread if you can. and really READ the contents.
Also. Just go out and drive the car stock and appreciate what it is and the intentions of the car from the factory.