VTI Milspec K-Series Engine Harness – OBD2 2002–2006 ECU (RSX, EP3, Civic Si)

After ripping through countless OEM RSX harnesses and months of in-house R&D, VTEC Innovations (VTI) is proud to release the definitive milspec K-series OBD2 ECU engine harness solution for 2002–2006 applications.

This isn’t a reworked stock harness or a “budget special.” Every single unit is brand new, built from scratch, and tested under real-world conditions in our own K-series cars.

Core Features:

• 🇺🇸 M22759/32 Tefzel wiring throughout – lightweight, heat resistant, and motorsport-approved.
• 🔒 OEM connectors for both 02–04 and 05–06 ECU layouts – true plug-and-play.
• 🛡️ Raychem DR-25 & ATUM heat shrink – full loom protection, sealed against abrasion and heat.
• 📐 Proven VTI routing method – eliminates fitment guesswork, perfected after months of testing.
• ⚡ Shielded sensor pairs – critical trigger circuits are twisted and shielded to prevent sync loss.
• 🔧 Custom add-ons available – boost control, flex fuel, wideband, fan control, and more.

📦 What’s Included

• One complete plug-and-play milspec K-series harness
• Correct ECU-side terminations for 02–04 or 05–06 OBD2 ECU
• All necessary sensor and actuator connectors
• Integrated shielding and grounding
• Build sheet confirmation of any selected add-ons

🏆 Why VTI

Most aftermarket K-series harnesses either start life as a chopped OEM core or take shortcuts with materials. We don’t.

At VTEC Innovations, every harness is:

✔️ Designed and hand-built in Vermont, USA

✔️ 100% new, not re-pinned or recycled

✔️ Quality checked step by step through our 6-stage build process

✔️ Tested in-house on real K-series swaps before release

We’ve eliminated the weak points. We’ve proven the layout. Now you get the results.