SPDZ1 GM SQUARE - PRIMARY O2 EXTENSIONS 24" (2009-2015 CTS-V / 2004-2006 GTO / 2008–2009 Pontiac G8) - Pair of Harnesses
SPDZ1 GM SQUARE - PRIMARY O2 EXTENSIONS 24" (2009-2015 CTS-V / 2004-2006 GTO / 2008–2009 Pontiac G8) - Pair of Harnesses
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SPDZ1 Oxygen Sensor Extension Harnesses (Pair)
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.
Key Features
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Plug-and-play design with factory-style connectors
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Allows safe relocation of oxygen sensors during header or exhaust installs
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High-temperature, automotive-grade wiring for long-term reliability
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Prevents harness tension and potential sensor damage
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No cutting or splicing required
Sold as a pair (2 extensions included)
Vehicle Applications
2009–2015 Cadillac CTS-V
2004–2006 Pontiac GTO
2008–2009 Pontiac G8