Originally Posted by red6spd

Go with the FI. I'm a very big fan of Stillen, I had there Cat-Back on my Spec-V and my Altima. But when it came to the 370Z I heard there where a lot of fitment issues the tips stuck out to far and its a little tame in the sound department. FI gives you a choice from mild with the 18in Resonated Cat-Back to wild with there Non-Resonated Cat-Back. I also think it looks better.