BLOX Racing O2 Bung

2011–2025 Subaru Forester / Subaru WRX / Subaru Impreza 2.0L Turbo / 2.5L

Part #: BXFL-00104

Overview

The BLOX Racing O2 Bung is a high-quality, durable component designed for automotive enthusiasts who perform custom exhaust modifications or build their own headers. Crafted from premium mild steel, this oxygen sensor bung provides a reliable and secure mounting point for oxygen sensors in custom exhaust systems. Whether you're upgrading your vehicle for improved performance, tuning, or simply replacing worn or damaged sensor mounts, this bung offers a perfect solution.

Ideal for DIY mechanics, tuners, and performance shops, the BLOX Racing O2 Bung ensures your oxygen sensors are properly positioned for accurate readings, helping you optimize your vehicle's air-fuel mixture and overall engine efficiency. Its robust construction and precise threading make installation straightforward, supporting your efforts to enhance your vehicle's performance and reliability.

Key Features

The BLOX Racing O2 Bung is engineered with the performance enthusiast in mind, offering several key features:

• Cast from 1018 mild steel, providing excellent strength and durability for demanding applications.
• Designed with precise threading to ensure a secure fit for most standard oxygen sensors.
• Compatible with a wide range of custom headers and exhaust systems requiring sensor mounting points.
• Easy to weld into custom exhaust pipes or headers, facilitating seamless integration into your build.
• Resistant to corrosion and heat, maintaining integrity under high-temperature exhaust conditions.
• Manufactured by BLOX Racing, a trusted name in performance automotive parts, ensuring quality and consistency.
• Perfect for custom fabrication projects, race cars, or upgrading existing exhaust setups.

Construction & Design

The BLOX Racing O2 Bung is crafted from high-quality 1018 mild steel, a material known for its strength and weldability. Its cast design ensures a uniform shape and precise dimensions, making it easy to weld into custom exhaust pipes or headers. The bung features a standard threaded hole that accommodates most oxygen sensors, providing a secure and leak-free connection.

The simple yet robust design allows for straightforward installation, whether you're a seasoned fabricator or a DIY enthusiast. Its heat-resistant properties and corrosion resistance make it suitable for long-term use in high-temperature exhaust environments, ensuring consistent performance over time.

Performance & Compatibility

This oxygen sensor bung is essential for custom exhaust setups, enabling accurate sensor placement for optimal engine tuning. Proper sensor positioning helps improve air-fuel ratio readings, leading to better throttle response, fuel economy, and overall engine performance. Its durable construction ensures that it maintains its integrity under the intense heat and vibration typical of high-performance exhaust systems.

Installation & Fitment

The BLOX Racing O2 Bung is designed for easy integration into custom exhaust systems. It requires welding into your exhaust pipe or header, making it a versatile choice for custom fabrication projects. No additional modifications or special tools are necessary beyond standard welding equipment. As a cast component, it offers a precise fit and reliable performance once installed.

Ensure proper alignment and secure welds to prevent exhaust leaks and sensor misreadings. This bung is compatible with most standard oxygen sensors, making it suitable for a wide range of vehicles and custom applications.

What's Included

• Cast mild steel O2 Bung with threaded hole
• Welding-ready design

Ideal For

• DIY automotive enthusiasts building custom exhaust systems
• Performance tuners seeking reliable sensor mounting points
• Race car builders requiring durable, heat-resistant sensor mounts
• Mechanics replacing or upgrading existing oxygen sensor mounts