I know, a "secretive" question for sure, but an interesting one.

I run a 260Z that I'm getting ready to do a couple of things to in order to free up some power, or at least improve breathing. As some of you know I run some crappy air filters that came with the car and I plan to build a larger panel type filter to get rid of those. A few folks have pointed out that should be worth a couple of ponies.

I also plan to do something with my exhaust to improve flow. I am running a side exit exhaust with a muffler and it is fairly quiet. Do you Z guys use mufflers at all? I was thinking of a straight pipe that went back to the axles and turned down, no muffler. Will I still be able to pass sound?

I still haven't dynoed the 260Z yet but I really need to for tuning purposes and to simply see where it is at on the horsepower scale. Any of you guys have some dyno results from your Z?