OBD2A / OBD2B to OBD1 ECU Adapter Harness | VTI Mil-Spec Autosport

Step up your Honda/Acura swap game with VTI’s OBD2A & OBD2B to OBD1 ECU Adapter Harnesses.

These aren’t cookie-cutter eBay adapters – they’re designed, tested, and manufactured in-house at VTEC Innovations (VTI) with the same standards we use in our full mil-spec harnesses.

• True OEM OBD1 ECU connectors – durable, tested fitment.
• M22759/32 Mil-Spec Tefzel wire – lightweight, abrasion & heat resistant.
• Clean, loom-free routing – professional splice points, no bulky shrink wrap.
• Plug-and-play install – drop right into your stock OBD2A or OBD2B harness.
• Made in the USA – designed, tested, and built at VTEC Innovations.

Perfect for OBD1 ECU conversions, Hondata S300, chipped P28/P72 setups, or any professional motorsport build needing reliable ECU connectivity.

Technical Specs

• Wire: M22759/32 (20AWG mil-spec Tefzel)
• Build Style: Autosport splice, no loom
• Connector Type: Genuine OEM OBD1 ECU
• Options: OBD2A → OBD1 / OBD2B → OBD1
• Warranty: Backed by VTI’s professional autosport quality guarantee

What’s Included

• 1x VTI OBD2A or OBD2B to OBD1 ECU Adapter Harness
• Install guide PDF (download)