Skunk2 Racing Ultra Race Centrefeed Billet Intake Manifold Honda K-Series K20/K24

Skunk2 Racing Ultra Race Centrefeed Billet Intake Manifold Honda K-Series K20/K24

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The Skunk2 Ultra-Race Series Billet Intake Manifold, for Honda K and B series engines is the ultimate manifold for high-horsepower street and race engines. Unlike the standard Ultra Manifold, the Billet Ultra was designed for 8-injector mounted top-side with a single fuel rail.

All Ultra Manifolds feature tapered runners with trumpet profiled entries and plenums that have been designed and optimized using CFD and on the dyno. The short tapered high-volume runners combined with a large plenum favors maximum top end power over lower end power and response. After all of our in-house testing, and also third party dyno testing, we have yet to see a intake manifold that comes close to the performance of the Skunk2 Ultra Race Manifold.

The manifold features the same Skunk2 Ultra high flowing runners and modular plenum design. The modular design allows plenum volume to easily be increased using simple spacers, and the runners can also be freely ported for additional flow and volume. The versatility of this manifold allows enthusiasts and engine builders to tune the manifold combination to best suit their needs.

The combination of the billet coolness-factor with limited production makes the Skunk2 Billet Ultra Race Manifold special offering.

*Does not fit K20C variants


  • Best in Class Power Increase
  • Single Rail Top Mount 8-Injectors
  • Tapered Hi-Velocity CNC Billet Intake Runners
  • Modular Removable Plenum Design
  • Plenum Volume Can Be Adjusted Using Spacers
  • 90mm Throttle Body Flange - Std. 5.0 Ford Bolt Pattern
  • Thermal Gasket Included

The Skunk2 K-Series Ultra Street manifold is designed with an early style (PRB) intake manifold flange. Engines with the later style (RBC) flange will require the use of an aftermarket water bypass adapter.

Power will vary from build to build.

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)


Throttle Body

  • Pro 90mm Throttle Body Silver – (P/N 309-05-0900)
  • Pro 90mm Throttle Body Black – (P/N 309-05-0905)

Throttle Body Adapter

  • K (PRB) to Ultra Race 90mm 5.0L Ford Pattern (P/N 309-05-0025)
  • K (RBC) to Ultra Race 90mm 5.0L Ford Pattern (P/N 309-05-0010)
  • TPS Adapter – K to B (P/N 309-05-0100)


  • Map Sensor 3 Bar – (P/N 352-05-1515)
  • Map Sensor 4 Bar – (P/N 352-05-1500)