2009 G37X Coupe Re-Born
9 I bought this on a recommendation from a dealership service department. My hope was to eliminate throttle lag, give it a little more oomph on the go, and make it growl without being obnoxious. It gives me all of that. I didn't dyno before, and probably won't now. My butt-dyno tells me all I need to know. I got more than what I paid for. Great product!
I bought this mainly for HP and gas mileage gains. On the power front it absolutely delivers good nice throaty sound as well. Gas mileage is the only part where it falls short for me, my car tells me it has actually reduced my average miles per gallon by 3. I also enjoy driving my car a bit more aggressively so that could be it as well. Overall it looks sounds and performs great.