SPDZ1 GM SQUARE - PRIMARY O2 EXTENSIONS 24" (2009-2015 CTS-V / 2004-2006 GTO / 2008–2009 Pontiac G8) - Pair of Harnesses
SHIPPING - RETURNS - WARRANTY - CANCELLATION POLICY
*** Market Conditions after 2020 have changed the landscape of automotive parts. Although we try to stock 1000's of items in our multiple warehouse and use multiple distribution channels, having back-orders are unavoidable in today's market. If you are in need of a product quickly, we suggest email, message, or call us for availability so that we may explore your options.
Email: Sales@Speedzoneweb.com
Call: 407-846-8430
Text: 407-749-6314
Frequently Asked Questions
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
Our History
For 26 years Speedzone Performance LLC has been providing aftermarket car parts to Central Floridians and 1000's of customers online. What makes us different than all the other places online? We have 3 actual brick and mortar locations where were serve customers daily and find new ways to provide support and assistance to the automotive community at large. From our in house SPDZ1 Brand, to our constantly growing in stock inventory, we strive to make our customer service and ease of purchase stand out from the rest! We are also one of the largest automotive part financing providers anywhere in the United States, and continue to provide more options for our customers every year. We love what we do, and it shows in every product we sell and every new customer who becomes a part of our Speedzone Family.