50Z 03+POP-CHARGER AIR FILTER W/HEAT SHIELD Produces a real 6.5+ hp increase at the wheels! Hood sealed heat shield insures outside air temperatures. This system consistently out performs extended piping systems on the 350Z without the risk of ingesting water due to remote filter positioning. NissanPerformanceMag: "Not wanting to mess around we put the car on the dyno immediately and recorded the biggest gains we've seen on any 350Z intake yet: 6.5 hp at the wheels! The driving difference was noticeable, springing a welcomed quickness to redline. To say we were amazed is an understatement.