Whats up everybody? I bought my 06' coupe Athens Blue 5at off the showroom floor. I love this car and have kept it stock. Only has 24,000 miles so far. But I'm too used to its speed and need too make it faster without going FI.
I've searched this forum for quite a few months to see what mods would be right. Let me know what u guys think.

Engine:
1. Plenum spacer 5/16
2. C.A.I
3. Transgo

Exhaust:
1. HFC's or true duel exhaust whichever brings greater HP or both

Suspension:
1. coilovers (not sure which ones) to drop car

Wheels:
1. 18's to 19's all black
2. wheel spacers 20mm(front) 25mm(rear)

Cosmetics:
1. clear corners
2. black grille

with these particular mods would I need to reflash the ECU?
What kind of hp would i gain from the engine and exhaust mods?
how much would this run me? and is the price worth the hp gain?

And finally if some knows a reputable place in Westchester county NY who works on our cars in particular.

Thanks
Charlie