Skunk2 Ultra Series Race 1-Liter Intake Manifold Plenum Spacer Silver - Honda B/ K-Series - 907-05-9001 91mm The 3-port systems works by

The 3-port systems works by interrupting the boost signal traveling from the turbo to the wastegate

Billet Aluminum - Machined for looks and weight-savings

The sleek design of the shrouds will totally change the look of your engine bay

Reduce Rotational Mass by 4 lbs Over Stock

HA3-HDR4 kit features ACT's most popular Heavy Duty pressure plate

Skunk2 Ultra Series Race 1-Liter Intake Manifold Plenum Spacer Silver - Honda B/ K-Series - 907-05-9001 91mm The 3-port systems works byThe Skunk2 Racing Plenum Spacer is used to increase the internal volume of the Ultra Race Intake Manifolds by 1 Liter. Includes: Billet Aluminum Spacer Longer Socket Head Hardware Gaskets