• 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
  • SPDZ1 GM SQUARE - PRIMARY O2 EXTENSIONS 24" (2009-2015 CTS-V / 2004-2006 GTO / 2008–2009 Pontiac G8) - Pair of Harnesses

Speedzone Performance LLC

SPDZ1 GM SQUARE - PRIMARY O2 EXTENSIONS 24" (2009-2015 CTS-V / 2004-2006 GTO / 2008–2009 Pontiac G8) - Pair of Harnesses

$34.99
$34.99
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Fitment

Shipping

All pricing does not include freight charges. All orders are insured for full value. Speedzone is not responsible for any damage incurred during shipment. All merchandise leaves from our facility or any one of our multiple designated distribution warehouses properly packaged and in perfect condition. When you receive your shipment, please inspect your packages in the presence of the delivery person. All damage claims are the responsibility of the customer and must be made with the freight carrier and reported to Speedzone Performance LLC within 3-5 working days if you would like us to try and help provide info for a claim. Speedzone Performance LLC does not usually initiate claims for the customer, however we will provide information and try our best to assist if the need for one arises. In the event of a damaged shipment, please keep all the original packages and packing material for inspection. If for some reason a shipment is returned to us undelivered after 3 attempts, you will be responsible for all freight charges and a hold put on all future shipments until the incurred shipping costs have been paid in full. For expedited orders we can ship via UPS Next Day, Second Day, or 3 day delivery at extra cost. We can also ship via Federal Express if preferred (based on product and warehouse).

International shipments will always have duties and customs fees. Speedzone does not cover these fees and your shipping charge will not cover these extra clearance fees based on your local country. We suggest getting an estimate of these fees from your local authority before placing an order.

SHIPPING ERRORS

Errors in shipping occasionally happen. In the case of a shipping error on our part we will issue a UPS call tag for return of the merchandise and ship the correct part to you. We will charge your credit card for this merchandise until we receive the original part back whereupon we will immediately credit your account. All returned parts must be in 100% new condition and be in the original packaging.

Returns

RETURN POLICY

Buyers assume the responsibility of purchasing the correct product. Please read all of the product information and look at pictures before purchasing (please note some product pictures are for display purposes only and may not be representative of the final product you will receive). You have the ability to request product fitment verification before purchasing a product by simply using the button for request on the product. Returned products are subject to a 20%-35% restocking fee based on manufacturer and company policy and the responsibility of buyer to pay original shipping costs incurred by seller as well as any associated shipping costs to return items (Buyer is responsible to ship returns back at their own cost). We do not accept returns on items that have been used or previously installed, or any type of electronic products. Please contact the manufacturer of a specific product if you are having an issue with that specific item. Items are not eligible for return after 30 days of order being received.  Some brands do not accept returns on any of their products; please see product description for these brands.

NO RETURNS on the following;

  • Clearance Items
  • Open Items
  • Used or Installed Items
  • Special Order Items
  • Incomplete Items
  • Items with Incomplete or Damaged packaging
  • Engine Internals
  • Electronics
  • Lighting or Components that emit Light
  • Aerodynamics Parts
  • Mount and Balance Package Wheels & Tires
  • Products Sold or Offered by Burger Tuning (Inlcuding but not limited to any JB4 Product)
  • Products Sold by Speed Engineering 
  • Products Purchased using a Financing Option

Start Your Return Here:  Speedzone Performance LLC RMA Form

SPECIAL ORDER CANCELLATIONS

Special order items are items considered to be built to order, or specifically ordered for an application.  When ordering these items, please understand that it may take time for these products to be built and once a build is started it is not possible for this to be canceled.  In rare circumstances that involve a special approval process, we will assume responsibility to stock the item you have ordered and charge a 30% cancellation fee based on the individual item value. 

Warranty

WARRANTY

Items sold by Speedzone Performance LLC may not be legal for street use in all states. WARNING, it is the buyer`s responsibility to comply with applicable state laws.  Buyer understands that due to strict U.S. federal and State safety crash guidelines, Speedzone Performance LLC is not responsible or liable for any damages or possible injuries incurred as a result of any accidents due to driver error, incorrect installation, bad judgment, or act of nature/GOD, Allah, Jehovah, etc. All products are intended for off-highway uses only, and should be used for their intended purposes only. Speedzone Performance LLC does not take responsibility for installation, modification, misuse and/or unusual stress of the products. The buyer assumes all responsibilities for determining the suitability of the products. Speedzone Performance LLC is not responsible for any damages incurred either directly or indirectly on the vehicles or operators/ passengers within the vehicles.

 Disclaimer of Implied Warranties

Speedzone Performance LLC DISCLAIMS ALL IMPLIED WARRANTIES AND SIMILAR OBLIGATIONS (OTHER THAN GOOD TITLE) INCLUDING BUT NOT LIMITED TO THOSE OF FITNESS FOR A PARTICULAR PURPOSE, AND MERCHANTABILITY, WHETHER OTHERWISE ARISING BY LAW, CUSTOM, USAGE, TRADE PRACTICE, COURSE OF DEALING, OR COURSE OF PERFORMANCE. There are no warranties, which extend beyond those express warranties contained in the Agreement. Buyer affirms that it has not relied upon Seller's skill nor judgment to select or furnish the Goods for any particular purpose beyond the specific express warranties in the Agreement. Any design provided by Seller is based on information provided by Buyer. Any modifications of drawings, prototypes and other work of Seller after approval by Buyer will be at Buyer's expense at Seller's normal rates for services and materials. Seller does not warrant the Goods will comply with the requirements of any safety or environmental code or regulation of any federal, state, municipality or other jurisdiction beyond the specific express warranties in the Agreement.

WE RESERVE THE RIGHT TO CANCEL AN ORDER FOR ANY REASON; PRICING ERRORS AND OR SHIPPING ERRORS HAPPEN AND WE WILL UPDATE YOU IF THIS OCCURS.

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Shipping Notice

Some oversized, heavy, or specialty items may incur additional shipping charges based on your delivery location. If this applies to your order, our team will contact you after checkout with the updated cost. Orders will not ship until additional charges are confirmed and paid.

SPDZ1 GM SQUARE - PRIMARY O2 EXTENSIONS 24" (2009-2015 CTS-V / 2004-2006 GTO / 2008–2009 Pontiac G8) - Pair of Harnesses

$34.99

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 (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

  • 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)

Vehicle Applications

2009–2015 Cadillac CTS-V

2004–2006 Pontiac GTO 

2008–2009 Pontiac G8 

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