Ultra Race Intake Manifold – K20A2 Style – All Black


Skunk2 Racing is proud to announce the next generation of high performance intake manifolds for the ’02-’05 Civic Si and ’02-’06 RSX/ RSX Type S, and/ or any swap using the K20A/ K20A2/ K20Z1/ K24A1 engines or cylinder heads has finally arrived! The much anticipated Ultra Race Intake Manifold is the result of years worth of R&D and building upon the performance legacy of our Pro Series Intake Manifold. Using the latest in CFD (Computational Fluid Dynamics) software; Skunk2 Racing has created a three-piece modular design that allows for easy disassembly, porting, and plenum volume changes through the use of a removable plenum and optional plenum spacers. The result is a design that is less restrictive, yielding both torque and power gains well over many of the competitors.

30 in stock (can be backordered)



  • Modular 3pc. Design w/ Removable Plenum
  • 3.5L Plenum Volume**
  • 90mm Throttle Body Flange – Std. 5.0L Ford Pattern
  • 6.0” Tapered Hi-Velocity Runners
  • Raised 87mm Velocity Stacks
  • Generously Cast Runner Walls for Porting
  • Provisions Secondary Fuel Rail & Injectors
  • 4 x 1/8” NPT, 3 x 1/4” NPT, and 1 x 3/8″ NPT Accessory Ports
  • Hi-Grade Mounting Hardware
  • Thermal Gasket Included
  • Fits MOST Popular Chassis Configurations – Not Just Race Cars – See Notes

**Optional Billet Aluminum Plenum Spacers Available in 1L or 2L Sizes


  • 2002 – 2005 Honda Civic (Si)
  • 2002 – 2006 Acura RSX (Base, Type-S)
  • The K Series Ultra “Street” Manifold uses the EARLY PRB/ PRC style cylinder head and throttle body mounting flange pattern but can be installed on the LATE RBC/ RBB style cylinder heads through the use of an aftermarket Water Bypass Adapter and associated throttle body or throttle body adapter.
  • 3.5 Liter > High Horsepower N/A and Forced Induction Applications to 600HP
  • 4.5 Liter > 600-1000HP
  • 5.5 Liter > 1,000HP Up

US Patent: D677700

***Modification required on vehicles using OEM Idler Pulley & Water Pump Housing***

**Picture Courtesy of EWerkz LLC**


Additional information

Weight 20.72 lbs
Dimensions 20 × 16 × 9 in


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