The BLOX Racing Gen2 Hypertemp plenum spacer is a 5/16-inch hardware kit offered for 350Z installations and supplied as a hardware-only kit per the description. It provides a specific spacer thickness for Gen2 intake plenums on the noted 350Z application and is intended for builders who require that spacer and its hardware to adjust plenum volume or intake fitment.
BLOX Racing Gen2 Hypertemp Plenum Spacer - 5/16in - 350Z-Hardware Kit Only