Skunk2 O2 Sensor Wire Harness Extension – 2006–2014 Honda Civic Si | Aftermarket Header O2 Sensor Relocation

The Skunk2 O2 Sensor Wire Harness Extension for the 2006–2014 Honda Civic Si is a direct-fit O2 sensor wiring extension designed for Civic Si owners installing an aftermarket header — extending the factory O2 sensor wires to reach the new O2 sensor bung location on an aftermarket header where the OEM wire length is insufficient. Designed specifically for use with the Skunk2 header and exhaust system for the FD2/FG2 Civic Si, this extension eliminates the need to splice or extend the factory O2 sensor wiring — a clean, plug-and-play solution for the most common wiring challenge encountered during aftermarket header installation on the K20Z3-powered Civic Si.

Key Features:

• O2 sensor wire extension — extends the factory Civic Si O2 sensor wiring harness to reach the new bung location on an aftermarket header — eliminates the need to splice, extend, or modify the factory wiring
• Plug-and-play — designed to connect directly to the factory O2 sensor wiring connector — no cutting, splicing, or soldering required
• Designed for Skunk2 header and exhaust — engineered specifically for use with the Skunk2 aftermarket header for the 2006–2014 Civic Si — correct length and connector type for the Skunk2 header's O2 bung location
• Compatible with other aftermarket headers — also suitable for other aftermarket headers where the OEM O2 sensor wire length is insufficient to reach the new bung location — verify connector compatibility before ordering
• Correct fitment — engineered for the 2006–2014 Honda Civic Si (FD2/FG2 chassis — K20Z3 engine) — correct connector type for the Civic Si's O2 sensor wiring
• Skunk2 quality — manufactured by Skunk2 Racing, one of the most respected Honda performance brands in the aftermarket

Why You Need an O2 Extension for an Aftermarket Header:

When installing an aftermarket header on the 2006–2014 Honda Civic Si, the O2 sensor bung location on the aftermarket header is almost always in a different position than the factory exhaust manifold's bung location — typically further from the engine or in a different orientation. The factory O2 sensor wiring harness is sized for the OEM bung location and is frequently too short to reach the aftermarket header's bung without being stretched, routed incorrectly, or modified. Stretching or incorrectly routing the O2 sensor wiring can cause wiring damage, connector stress, and O2 sensor errors. The Skunk2 O2 extension provides the additional wire length required to correctly route the O2 sensor wiring to the aftermarket header's bung location — a clean, correct solution that eliminates the wiring compromise that a too-short factory harness creates.

Specifications:

• Brand: Skunk2 Racing
• Part Number: SKK201-05-0614
• Barcode: 201-05-0614
• Type: O2 sensor wire harness extension
• Application: 2006–2014 Honda Civic Si — FD2/FG2 chassis — K20Z3 engine
• Designed for: Skunk2 header and exhaust — compatible with other aftermarket headers (verify connector compatibility)
• Weight: 0.08 lbs

Fitment Information:

• 2006–2014 Honda Civic Si — FD2 chassis (sedan) / FG2 chassis (coupe) — K20Z3 2.0L engine
• Designed for use with the Skunk2 aftermarket header — compatible with other aftermarket headers where the OEM O2 wire length is insufficient (verify connector type compatibility before ordering)
• Note: Verify O2 sensor connector compatibility with your specific aftermarket header before ordering if not using the Skunk2 header. This extension is designed for the primary (upstream) O2 sensor location — verify which O2 sensor location requires extension for your specific header installation.

What's Included:

• Skunk2 O2 sensor wire harness extension — 2006–2014 Honda Civic Si (SKK201-05-0614)

Installation Notes:

• Connect the extension between the factory O2 sensor wiring connector and the O2 sensor — no cutting, splicing, or soldering required for a standard installation
• Route the extended wiring away from heat sources — the exhaust header and downpipe generate significant heat that can damage O2 sensor wiring if routed too close
• Secure the extended wiring with appropriate heat-resistant wire loom or sheathing where it runs near the exhaust system
• Verify correct O2 sensor function after installation — confirm no O2 sensor fault codes are present after the engine reaches operating temperature

Why Skunk2 Racing?

Skunk2 Racing is one of the most respected Honda and Acura performance brands in the aftermarket — known for their intake manifolds, camshafts, suspension components, intercoolers, headers, and exhaust systems for Honda and Acura platforms. Skunk2's O2 extension is a purpose-built accessory for their Civic Si header — a small but important component that ensures a correct, clean header installation without wiring compromises. For Civic Si owners installing the Skunk2 header or any aftermarket header where the factory O2 wiring is too short, the Skunk2 O2 extension is the correct solution.

Perfect For:

• 2006–2014 Honda Civic Si (FD2/FG2 — K20Z3) owners installing the Skunk2 aftermarket header who need to extend the factory O2 sensor wiring to reach the header's bung location
• Civic Si owners installing any aftermarket header where the factory O2 sensor wiring is too short to correctly reach the new bung location without stretching or modification
• Clean, plug-and-play O2 sensor wiring solution that eliminates the need to splice or extend the factory wiring during aftermarket header installation

Note: Designed for 2006–2014 Honda Civic Si K20Z3. Verify O2 sensor connector compatibility if using with a non-Skunk2 header. Route wiring away from exhaust heat sources. Verify correct O2 sensor function after installation.