As low as $35 / month using 
VARIATIONS (5)
The Skunk2 Racing Plenum Spacer is used to increase the internal volume of the Ultra "Street" Intake Manifolds by .50 Liters.
The Skunk2 Racing Plenum Spacer is used to increase the internal volume of the Ultra "Street" Intake Manifolds by .50 Liters.
INCLUDES:
.50L Billet Aluminum Spacer
Longer Socket Head Hardware
Gaskets