Originally Posted by 280z/300zx

The stillen and FI exhaust have been shown to get similar results. So it comes down to price, sound, look, and ease of availability. When I made my choice last year I went with FI over stillen and I've never regretted it. Even after having to wait several weeks for it.

To the OP, I have the carbon fiber mufflers, something stillen doesn't offer, and it sounds and looks fantastic.