Kooks 12in O2 Extension Harness — Fits 04-07 Cadillac CTS-V & 08-09 Pontiac G8 (All Trims), 04-06 Pontiac GTO

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Kooks Headers

Kooks Headers engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Kooks Headers lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Kooks 12in O2 Extension Harness for GM Performance Vehicles

Ensure proper oxygen sensor functionality after installing aftermarket headers with the Kooks 12-inch O2 Extension Harness. This individual extension wire is crucial for maintaining accurate air-fuel ratio readings and preventing check engine lights, especially when header installations relocate O2 sensors further from their original position. Kooks Headers and Exhaust has been a leader in high-performance exhaust solutions for over 50 years, providing components that meet the rigorous demands of racing and street applications.

Precision Fitment for Cadillac CTS-V, Pontiac G8, and GTO

This specific 12-inch O2 extension harness is engineered for a perfect fit on several iconic GM performance vehicles. It is compatible with 2004-2007 Cadillac CTS-V models, all 2008-2009 Pontiac G8 trims (Base, GT, GXP), and 2004-2006 Pontiac GTOs. The harness features OEM-style connectors for a direct, plug-and-play installation, eliminating the need for complex wiring modifications. Trust Kooks for reliable, high-quality wiring solutions that complement your performance exhaust system, available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2004-2007 Cadillac CTS V
2008-2009 Pontiac G8 Base
2008-2009 Pontiac G8 GT
2009 Pontiac G8 GXP
2004-2006 Pontiac GTO Base

Product Details

Product Description
Part Numbers
Sizing & Fit

About Kooks Headers

Kooks Headers engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Kooks Headers lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Kooks 12in O2 Extension Harness for GM Performance Vehicles

Ensure proper oxygen sensor functionality after installing aftermarket headers with the Kooks 12-inch O2 Extension Harness. This individual extension wire is crucial for maintaining accurate air-fuel ratio readings and preventing check engine lights, especially when header installations relocate O2 sensors further from their original position. Kooks Headers and Exhaust has been a leader in high-performance exhaust solutions for over 50 years, providing components that meet the rigorous demands of racing and street applications.

Precision Fitment for Cadillac CTS-V, Pontiac G8, and GTO

This specific 12-inch O2 extension harness is engineered for a perfect fit on several iconic GM performance vehicles. It is compatible with 2004-2007 Cadillac CTS-V models, all 2008-2009 Pontiac G8 trims (Base, GT, GXP), and 2004-2006 Pontiac GTOs. The harness features OEM-style connectors for a direct, plug-and-play installation, eliminating the need for complex wiring modifications. Trust Kooks for reliable, high-quality wiring solutions that complement your performance exhaust system, available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2004-2007 Cadillac CTS V
2008-2009 Pontiac G8 Base
2008-2009 Pontiac G8 GT
2009 Pontiac G8 GXP
2004-2006 Pontiac GTO Base

Product Details

Product Description

About Kooks Headers

Kooks Headers engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Kooks Headers lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Kooks 12in O2 Extension Harness for GM Performance Vehicles

Ensure proper oxygen sensor functionality after installing aftermarket headers with the Kooks 12-inch O2 Extension Harness. This individual extension wire is crucial for maintaining accurate air-fuel ratio readings and preventing check engine lights, especially when header installations relocate O2 sensors further from their original position. Kooks Headers and Exhaust has been a leader in high-performance exhaust solutions for over 50 years, providing components that meet the rigorous demands of racing and street applications.

Precision Fitment for Cadillac CTS-V, Pontiac G8, and GTO

This specific 12-inch O2 extension harness is engineered for a perfect fit on several iconic GM performance vehicles. It is compatible with 2004-2007 Cadillac CTS-V models, all 2008-2009 Pontiac G8 trims (Base, GT, GXP), and 2004-2006 Pontiac GTOs. The harness features OEM-style connectors for a direct, plug-and-play installation, eliminating the need for complex wiring modifications. Trust Kooks for reliable, high-quality wiring solutions that complement your performance exhaust system, available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2004-2007 Cadillac CTS V
2008-2009 Pontiac G8 Base
2008-2009 Pontiac G8 GT
2009 Pontiac G8 GXP
2004-2006 Pontiac GTO Base

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