Holley EFI O2 Sensor Weld Ring - 18mm x 1.50 Steel (534-49)

SKU: GVMR_534-49
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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 Holley EFI

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

Secure Your O2 Sensor with the Holley EFI 18mm Steel Weld Ring

Ensure a precise and leak-free installation for your oxygen sensor with the Holley EFI O2 Sensor Weld Ring (part number 534-49). This essential component provides a robust mounting point for any 18mm x 1.50 threaded oxygen sensor, allowing you to integrate wideband or narrowband O2 sensors into custom exhaust systems, headers, or downpipes. Crafted from durable steel with a natural finish, this weld ring is designed for longevity and reliable performance in high-temperature exhaust environments.

Critical for Accurate Air/Fuel Ratio Monitoring

Accurate oxygen sensor readings are fundamental for proper engine tuning and emissions control. A securely welded O2 bung prevents exhaust leaks that can skew sensor data, ensuring your engine control unit (ECU) receives the correct information for optimal air/fuel mixture adjustments. This leads to improved fuel economy, increased power, and reduced emissions.

  • Thread Size: 18mm x 1.50 female thread, compatible with most standard O2 sensors.
  • Material: High-quality Steel for strength and heat resistance.
  • Finish: Natural, ready for welding.
  • Installation: Weld-on design for a permanent and secure fit.
  • Application: Ideal for custom exhaust fabrication, header modifications, and O2 sensor relocation.
  • Part Number: 534-49.

Whether you're building a custom exhaust, upgrading your headers, or adding a wideband O2 sensor for tuning, the Holley EFI O2 Sensor Weld Ring is an indispensable part of a professional installation. Its robust construction guarantees a stable platform for your sensor, contributing to accurate engine management. Find this and other quality exhaust components at GGCRACING.COM.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Holley EFI

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

Secure Your O2 Sensor with the Holley EFI 18mm Steel Weld Ring

Ensure a precise and leak-free installation for your oxygen sensor with the Holley EFI O2 Sensor Weld Ring (part number 534-49). This essential component provides a robust mounting point for any 18mm x 1.50 threaded oxygen sensor, allowing you to integrate wideband or narrowband O2 sensors into custom exhaust systems, headers, or downpipes. Crafted from durable steel with a natural finish, this weld ring is designed for longevity and reliable performance in high-temperature exhaust environments.

Critical for Accurate Air/Fuel Ratio Monitoring

Accurate oxygen sensor readings are fundamental for proper engine tuning and emissions control. A securely welded O2 bung prevents exhaust leaks that can skew sensor data, ensuring your engine control unit (ECU) receives the correct information for optimal air/fuel mixture adjustments. This leads to improved fuel economy, increased power, and reduced emissions.

  • Thread Size: 18mm x 1.50 female thread, compatible with most standard O2 sensors.
  • Material: High-quality Steel for strength and heat resistance.
  • Finish: Natural, ready for welding.
  • Installation: Weld-on design for a permanent and secure fit.
  • Application: Ideal for custom exhaust fabrication, header modifications, and O2 sensor relocation.
  • Part Number: 534-49.

Whether you're building a custom exhaust, upgrading your headers, or adding a wideband O2 sensor for tuning, the Holley EFI O2 Sensor Weld Ring is an indispensable part of a professional installation. Its robust construction guarantees a stable platform for your sensor, contributing to accurate engine management. Find this and other quality exhaust components at GGCRACING.COM.

Product Details

Product Description

About Holley EFI

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

Secure Your O2 Sensor with the Holley EFI 18mm Steel Weld Ring

Ensure a precise and leak-free installation for your oxygen sensor with the Holley EFI O2 Sensor Weld Ring (part number 534-49). This essential component provides a robust mounting point for any 18mm x 1.50 threaded oxygen sensor, allowing you to integrate wideband or narrowband O2 sensors into custom exhaust systems, headers, or downpipes. Crafted from durable steel with a natural finish, this weld ring is designed for longevity and reliable performance in high-temperature exhaust environments.

Critical for Accurate Air/Fuel Ratio Monitoring

Accurate oxygen sensor readings are fundamental for proper engine tuning and emissions control. A securely welded O2 bung prevents exhaust leaks that can skew sensor data, ensuring your engine control unit (ECU) receives the correct information for optimal air/fuel mixture adjustments. This leads to improved fuel economy, increased power, and reduced emissions.

  • Thread Size: 18mm x 1.50 female thread, compatible with most standard O2 sensors.
  • Material: High-quality Steel for strength and heat resistance.
  • Finish: Natural, ready for welding.
  • Installation: Weld-on design for a permanent and secure fit.
  • Application: Ideal for custom exhaust fabrication, header modifications, and O2 sensor relocation.
  • Part Number: 534-49.

Whether you're building a custom exhaust, upgrading your headers, or adding a wideband O2 sensor for tuning, the Holley EFI O2 Sensor Weld Ring is an indispensable part of a professional installation. Its robust construction guarantees a stable platform for your sensor, contributing to accurate engine management. Find this and other quality exhaust components at GGCRACING.COM.

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