Initiate Motorsports 5/16” Thermal Composite Plenum Spacer – VQ35DE & RevUpReduce heat soak and improve intake efficiency with the Initiate Motorsports 5 16 Thermal Composite Plenum Spacer, designed specifically for VQ35DE and VQ35DE RevUp engines found in the Nissan 350Z and Infiniti G35. This spacer is engineered to lower intake air temperatures and support consistent performance, especially on modified and aggressively driven cars. Unlike metal plenum spacers that retain heat, our spacer is made from a high strength