The JWT 350Z DUAL POP-CHARGER INTAKE SYSTEM for the 2007+ Nissan 350z. In 2007 Nissan drastically improved the VQ35 intake system by adding an extra throttle, so the question was, is there any room for improvement? After a full year of testing JWT got the answer, "YES", but only with the most efficient Pop-Charger Venturi inlets and hood-sealed heat shields. In addition to a 6.5 to10 WHP improvement, the tone of the engine due to the dual 6” venturis is definitely the most beautiful sound ever heard from a VQ engine