5+rwhp.. I am curious to see the results as well, I have the TOM'S drop in on order. Is the 16hp to the wheel or to the engine? Using the stock setup is smart I dont know about the small opening if hot air would soak in and drop performance. To me the results sound high I dunno will wait for the results.16+ HP!! Wow. What is your current K&N plus JoeZ supposed to give you?