Skunk2 Composite Plenum Spacer - 2003-2005 Nissan 350Z VQ35 - 307-07-0400Skunk2's revised Nissan Infiniti VQ35 Composite Intake Plenum Spacer V2. 0 is dyno proven and road tested to outperform all other intake manifold plenum spacers. Skunk2's Intake Plenum Spacer V2. 0 features a number of improvements, including a thicker design that increases plenum volume, lowers intake temperatures, and allows the engine's front cylinders to breathe more efficiently. All of this results in gains as high as 10 hp, increased throttle