Skunk2 Honda Civic Si (02–05), Acura RSX/RSX Type S (02–06), Honda K20A, K20A2, K20Z1 And K24A1 Applications - Ultra Street Intake Manifold - K20A2 Style - Black

The Skunk2 Ultra-Street Series Intake Manifold for Honda K20A/K20A2/K20Z1/K24A1 Engines is a high flowing manifold that bridges the performance gap between Skunk2s Pro Series and Ultra-Race series manifold. All Ultra manifolds feature tapered runners with trumpet profiled entries and plenums that have been designed and optimized using CFD and on the dyno. When compared to the Skunk2 Ultra Race, Ultra Street runners are longer with less taper, and the Ultra Street plenum has a smaller volume; this combination may limit ultimate peak power in favor for better response and better average power from mid to high.

The Skunk2 Ultra Street Manifold is cast as a two-piece manifold from aircraft grade A356 aluminum. The modular design means the plenum volume can easily be increased using simple spacers, and the runners can 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.

Recommended for high-performance naturally aspirated engines up to 275hp, and turbo/supercharged engines up to 750hp

Each manifold is vacuum tested, black wrinkle powder coated, and finished-off with our Signature Skunk2 Pro-Series nameplate.

Features:

Lightweight 356 Aluminum Alloy Construction

Modular Design with Removable Plenum

Rotatable Plenum Allows Driver-Side or Passenger-Side Throttle Body Mounting

1.8L Plenum Volume

Tapered 6.85" Long High-Velocity Runners w/ Raised Velocity Stack Entries

Generously Cast Runner Walls for Porting

71mm Throttle Body Opening

2 x 1/8" NPT and 2 x 1/4" NPT Accessory Ports

Hi-Grade Mounting Hardware

Gasket Included

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 our DBW Throttle Body Adapter (PN# 309-05-0120)

Installation on the 2002-2005 Honda Civic Si (EP3) requires several modifications. The radiator core support must be trimmed, the wiring for the TPS sensor may need to be extended, and clearance between the TPS and radiator hose may require custom upper hose or modification for the radiator.

Optional Billet Aluminum Plenum Spacer Available in .5L Size

Ultra Street Plenum Spacer Silver (P/N 907-05-9100)

Ultra Street Plenum Spacer Black (P/N 907-05-9101)

Recommendations:

Fuel Rail:

Ultra Street Fuel Rail - (P/N 350-05-7000)

Throttle Bodies:

Alpha Throttle Body 70mm - (PN 309-05-1060)

Alpha Throttle Body 74mm - (PN 309-05-1070)

Pro Throttle Body 70mm Silver - (P/N 309-05-0080)

Pro Throttle Body 70mm Black - (P/N 309-05-0085)

Pro Throttle Body 74mm Silver - (P/N 309-05-0090)

Pro Throttle Body 74mm Black - (P/N 309-05-0095)

Sensors:

TPS Sensor - (P/N 352-05-1410)

Map Sensor 3 Bar - (P/N 352-05-1515)

Map Sensor 4 Bar - (P/N 352-05-1500)

Adapters:

RBC Throttle Body to PRB Intake Manifold - (P/N 309-05-0120)

TPS Adapter K to B - (P/N 309-05-0100)

Thermal Gaskets:

Intake Manifold Gasket (PRB) - (P/N 372-05-0350)

Throttle Body Gasket Pro 70mm (PRB) - (P/N 372-05-0080)

Throttle Body Gasket Pro 74mm (PRB) - (P/N 372-05-0085)

Fits
Honda K20A2