Sorry the image quality is low. I snapped this from my iPhone.
Black line: Stock, but with rear muffler section removed.
Red line: Stillen G3 intakes, Stillen headers, Stillen Cats, Stillen exhaust.
Blue line: Stillen parts + Technosquare ECU reflash + dyno time.
In summary: $3,200 in Stillen parts gave a 26 hp increase over stock to bring it up to 328 compared to the original 302.
$700 for ECU reflash and dyno time ($500 for reflash only) gave an extra 15 whp for a total of 343 whp.
In total, it was nearly $5,000 including installation of the parts to gain 40 whp over stock. The throttle response in now extremely precise. The sound is wonderful, the over-rev to 8100 rpm is phenominal. The "Buzzy" engine vibrations that car magazines have been talking about are no worse above 7500 rpm. If anything, it smooths out a little.
One last thought: Lets pretend I gained 2 hp from removing the stock rear exhaust section. This car would have made 300 hp in this dyno. If the stock engine was 332 crank hp and it made 300 hp on this dyno, that's a conversion factor of 1.1066 for frictional loss (332/300). After mods, this car is making 343 hp on this dyno, which would be roughly
380 hp at the crank (343 x 1.1066). Not bad.
-Phim