K&N with heatshield ($40) (4FWHP)
Optimized TB (Free) (2FWHP)
Optimized stock Y-pipe ($75-100) (4FWHP/4-6TQ)
Replace resonator with a muffler and delete rear mufflers ($150) (4FWHP/TQ)
There's $300 tops and will give you the best bang for the buck. Also those gains are throughout the powerband and not just peak.
Still have more cash. Skip the stock exhaust and get a Trubendz 2.5" Magnaflow exhaust. 6-7FWHP for ~$400
Probably looking 175 to maybe 180FWHP & ~155FWTQ. (All depends how FUBAR'd your stock A/F is!)
Toss in a chip/tuner ($300-450) and you are looking around 185/165. (better if you add in $100-150 for dyno time) If you want to cheat and take the below IMRC TQ around 170ish if they remember to boost the low end timing.
With a good tune 190ish / 170
