This is a Skunk2 factory replacement 3.5L Plenum part for the Ultra Race Side-Feed K Series Intake Manifolds; 307-05-8000, 307-05-8050 and 307-05-8055.
- 5.0 Ford TB Bolt Pattern [4.25 in. Square Bolt Spacing]
- 90mm Throttle Body Flange
- 3.5L Plenum Volume