This is a Skunk2 factory replacement 3.5L Plenum for the Ultra Race Side-Feed B/D Series Intake Manifold.
 
Features:

• Aircraft grade A356 Aluminum
• Removable Plenum in Silver
• 3.5L Plenum Volume
• 90mm Throttle Body Flange - Std. 5.0L Ford Pattern
• Gasket Included
   

Optional Billet Aluminum Plenum Spacer Available:

• Ultra Race Plenum Spacer Silver - 1L (P/N 907-05-9001)
• Ultra Race Plenum Spacer Black - 1L (P/N 907-05-9051)
• Ultra Race Plenum Spacer Silver - 2L (P/N 907-05-9002)
• Ultra Race Plenum Spacer Black - 2L (P/N 907-05-9052)