When installing longtube headers on your GTO, G8, or CTS-V, the upstream O₂ sensors need to be relocated further downstream. Speed Engineering's 24" white square 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:
- 24" Length — Provides sufficient reach for upstream O₂ sensor relocation with longtube header installations
- White Square Connector Design — Direct plug-and-play fit for GTO, G8, and CTS-V applications
- Sold as a Pair — Both extensions included, one per bank
- No Cutting or Splicing Required — Direct connector fit for easy installation
Vehicle Applications:
Pontiac GTO
- 2004 Pontiac GTO
- 2005 Pontiac GTO
- 2006 Pontiac GTO
Pontiac G8
- 2008 Pontiac G8
- 2009 Pontiac G8
Cadillac CTS-V
- 2009 Cadillac CTS-V
- 2010 Cadillac CTS-V
- 2011 Cadillac CTS-V
- 2012 Cadillac CTS-V
- 2013 Cadillac CTS-V
- 2014 Cadillac CTS-V
- 2015 Cadillac CTS-V
Frequently Asked Questions:
Q: 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 24" extensions bridge that gap without any cutting or splicing.
Q: How many extensions are included? These are sold as a pair — one extension per bank, two total per set.
Q: What connector type do these extensions use? These use a white square connector design for direct plug-and-play fitment on GTO, G8, and CTS-V applications. No cutting or splicing required.
Q: Are these compatible with all GTO, G8, and CTS-V model years? These extensions are compatible with 2004–2006 Pontiac GTO, 2008–2009 Pontiac G8, and 2009–2015 Cadillac CTS-V applications.
Q: 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).