SPDZ1 GM SQUARE - PRIMARY O2 EXTENSIONS 24" (2009-2015 CTS-V / 2004-2006 GTO / 2008–2009 Pontiac G8) - Pair of Harnesses
SPDZ1 Oxygen Sensor Extension Harnesses are engineered to provide a high quality, reliable solution when additional sensor harness length is required—especially during header or exhaust upgrades that relocate factory oxygen sensors downstream.
Designed with OEM-style connectors and high-quality wiring, these extensions ensure proper sensor function without cutting, splicing, or modifying your factory harness. The result is a plug-and-play installation that maintains signal integrity, prevents wiring strain, and helps keep your engine management system operating as intended.
Whether you’re installing long-tube headers or custom exhaust components, SPDZ1 delivers the durability and fitment you expect from performance-driven hardware.
Plug-and-play design with factory-style connectors
Allows safe relocation of oxygen sensors during header or exhaust installs
High-temperature, automotive-grade wiring for long-term reliability
Prevents harness tension and potential sensor damage
No cutting or splicing required
Sold as a pair (2 extensions included)
2009–2015 Cadillac CTS-V
2004–2006 Pontiac GTO
2008–2009 Pontiac G8
Made with care and unconditionally loved by our customers, this signature bestseller exceeds all expectations.
Made with care and unconditionally loved by our customers, this signature bestseller exceeds all expectations.
At the heart of every product lies a unique story, driven by our passion for quality and innovation. Each item enhances your everyday life and sparks joy.
