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
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 24" 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 white square connector design for direct plug-and-play fitment on GTO, G8, and CTS-V applications. No cutting or splicing required.
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.
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).