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

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

Marsoni

M251S

$99.00

Get it in 3 business days with 1 day shipping. Friday, May 29

OBD2A / OBD2B to OBD1 ECU Adapter Harness – Mil-Spec | VTIOBD2A OBD2B to OBD1 ECU Adapter Harness Mil Spec VTI Not all adapters are created equal. VTI's OBD2A and OBD2B to OBD1 ECU adapter harnesses are designed, tested, and manufactured in house built to the same mil spec standards as our full engine harnesses. These are not cookie cutter eBay adapters. If you're running an OBD1 ECU conversion, Hondata S300, chipped P28 P72, or any professional motorsport build that demands reliable ECU connectivity this is

Easy Shipping

Quick Dispatch:

Your OBD2A / OBD2B to OBD1 ECU Adapter Harness – Mil-Spec | VTI orders ship within 1-2 business days.

Delivery Options:

Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your OBD2A / OBD2B to OBD1 ECU Adapter Harness – Mil-Spec | VTI ships.

Need Help?
Questions about OBD2A / OBD2B to OBD1 ECU Adapter Harness – Mil-Spec | VTI, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for OBD2A / OBD2B to OBD1 ECU Adapter Harness – Mil-Spec | VTI in your area.

Get Shipping Estimates

Country Zip/Postal Code

Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
To process your return/exchange, please contact us at [email protected]
Please click here for more details>>> Return & Exchange Policy

It’s a high‑quality replacement that does exactly what you want from an engine air filter — it helps protect your engine and keeps performance strong. Right away you can tell this is a well‑made part. The filter media has lots of pleats and high‑velocity cellulose material that’s designed to trap dirt and contaminants before they get into your engine, which helps reduce wear and tear on vital components. It offers up to ~98% filtration efficiency, so you know the incoming air is much cleaner and better for performance and fuel efficiency.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on February 26, 2026

Verified Purchase

Amazon Customer

Waukegan, US

★★★★★ 5

Great product

Size: 5424WS, Style: Workshop

Perfect for DIY filter change.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on May 30, 2026