1. 350z DE Motordyne Engineering 5/16" Basic Plenum Spacer
This is the 5/16 Stealth Plenum Spacer Upgrade for the 03-06 350Z. Gains from 11-13HP, simple and easy install. Works with OEM Strut Bar and Engine Cover.
2. 350z DE Motordyne Engineering 5/16" Iso Thermal Plenum Spacer
This is the 5/16 Stealth Plenum Spacer Upgrade for the 03-06 350Z. Gains from 12-14HP, simple and easy install. Works with OEM Strut Bar and Engine Cover. Iso Thermal Spacer Reduces Heak Soak and helps prevent power loss. Iso Thermal Gasket also allows upper and lower plenum to run cooler.
3. 350z DE Motordyne Engineering 5/16" Copper Iso Thermal Plenum Spacer
This is the 5/16 Stealth Plenum Spacer Upgrade for the 03-06 350Z. Gains from 12-14HP, simple and easy install. Works with OEM Strut Bar and Engine Cover. Iso Thermal Spacer Reduces Heak Soak and helps prevent power loss. Iso Thermal Gasket also allows upper and lower plenum to run cooler. Copper Throttle Upgrade Recommended for areas that have Heavy Snow Fall or Salt on roads.