Stillen And K&N 402834 Z-Tube High Flow Air Intake For 2003 -2007 Infiniti G35

11 hp gain to 2003 to 2007 Infiniti G35 Sedan and 5 hp gain to Coupe. $337 for this part new, it is in new condition, but with main box opened so I am selling for $225. The Z tube reduces plenum volume and resistance in the intake, and the venturi velocity stack increases air velocity into the engine. The heat shield allows for a colder inlet temperature which yields higher density of oxygen in the cylinder. All this adds up to having much more powerful and higher pressure explosions in the cylinder. The K&N filter is oiled and reusable/cleanable. There is some confusion regarding part four on the items list. That bracket is not in my kit, and I cannot find photos of it online from anybody selling the same kit new. Nonetheless what it should be is a small right angle that helps hold the heat shield in place. It is very easy to be custom-made at your home if you have a grinder or shears and a small scrap of sheet metal. I do not know if I lost that part or if it is a typo given it’s not in any online photos. I work in Carlsbad, live in Fallbrook. I could bring it with me to Carlsbad depending on your location.