Motordyne 5/16" Copper Iso-Thermal Plenum Spacer - Infiniti G35 & Nissan 350Z

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$ 365.19
$ 347.00
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The Motordyne Copper Iso Thermal plenum spacer adds 12HP-14HP and reduces the effect of power robbing heat soak by thermally isolating both the upper and lower plenum. Its 5/16″ thickness provides the best overall performance and is fully compatible with your engine cover and strut bar. All Motordyne Iso Thermal systems keep your upper and lower plenum cooled without the risk of throttle body freezing when driving in cold weather. Use the Copper if it snows in your area.



  • Compatible with OEM Strut Bar and Engine Cover
  • Direct Bolt-On
  • Does not throw CEL
  • Keeps Upper and Lower Plenum Cooled
  • Eliminates Risk of Throttle Body Freezing in Snow Climates
  • Copper Iso-Thermal System


Special Notes

  • 2003 Nissan 350Z require longer and thinner bolts to clear the raised plenum which are included in our kits. 


Vehicle Fitment

  • 2003-2007 Infiniti G35 Coupe RWD/AWD (V35)
  • 2003-2006 Infiniti G35 Sedan RWD/AWD (V35)
  • 2003-2006 Nissan 350Z (Z33)

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