When installing longtube headers on your 2018–2023 Mustang GT or 2018–2025 F-150, the upstream O₂ sensors need to be relocated further downstream. Speed Engineering's flat 5-pin O₂ sensor extensions make that relocation simple — plug-and-play extensions that allow the O₂ sensors to be moved to the correct position without cutting or splicing any wiring.
Sold as a pair.
Features:
- Flat 5-Pin Connector Design — Direct plug-and-play fit for 2018+ Ford Mustang GT and F-150 5.0L Coyote applications
- Sold as a Pair — Both extensions included, one per bank
- No Cutting or Splicing Required — Direct connector fit for easy installation
Vehicle Applications:
Ford Mustang GT — 5.0L Coyote
- 2018 Ford Mustang GT — 5.0L Coyote
- 2019 Ford Mustang GT — 5.0L Coyote
- 2020 Ford Mustang GT — 5.0L Coyote
- 2021 Ford Mustang GT — 5.0L Coyote
- 2022 Ford Mustang GT — 5.0L Coyote
- 2023 Ford Mustang GT — 5.0L Coyote
Ford F-150 — 5.0L Coyote
- 2018 Ford F-150 (2WD/4WD) — 5.0L Coyote
- 2019 Ford F-150 (2WD/4WD) — 5.0L Coyote
- 2020 Ford F-150 (2WD/4WD) — 5.0L Coyote
- 2021 Ford F-150 (2WD/4WD) — 5.0L Coyote
- 2022 Ford F-150 (2WD/4WD) — 5.0L Coyote
- 2023 Ford F-150 (2WD/4WD) — 5.0L Coyote
- 2024 Ford F-150 (2WD/4WD) — 5.0L Coyote
- 2025 Ford F-150 (2WD/4WD) — 5.0L Coyote
FAQ
Why do I need O₂ sensor extensions when installing longtube headers?
Longtube headers move the upstream O₂ sensor bungs further back from the cylinder head compared to factory manifolds. Without extensions, the factory O₂ sensor wiring is too short to reach the new bung location. These extensions bridge that gap without any cutting or splicing.
How many extensions are included?
These are sold as a pair — one extension per bank, two total per set.
What connector type do these extensions use?
These use a flat 5-pin connector design for direct plug-and-play fitment on 2018+ Ford Mustang GT and F-150 5.0L Coyote applications. No cutting or splicing required.
Are these compatible with 2015–2017 Mustang GT or F-150 models?
No. 2015–2017 5.0L Coyote applications use a square 6-pin O₂ connector. These flat 5-pin extensions are specific to 2018 and newer applications only.
Are these O₂ extensions street legal?
No. These are race-only parts intended for closed-course competition use only. Installation on a street-driven vehicle may violate the Clean Air Act (42 U.S.C. 7522(a)(3)).
⚠️ Race Use Only: This product is manufactured and sold for installation on vehicles used solely for competition. Once installed, the vehicle may not be used, registered, or licensed for use on a public road or highway. Installation on a street-driven vehicle may violate the Clean Air Act 203(a)(3), 42 U.S.C. 7522(a)(3).
