Yeah, I had been googling the issue a while back and could never remember seeing anything that would make a difference. But I found a Honda forum today that told me exactly what you guys just said.
Would putting a muffler back on the car cause any difference? Lower RPM's or better gas mileage you think? I know it'll quiet the stupid thing down, but I plan on selling it soon so it wasn't really an issue. But now it looks like we'll have to keep it longer since me buying the GTO fell through.