FiTech Oxygen Sensor Bung Kit – No-Weld Clamp-On Solution

Upgrade your exhaust system for EFI without ever touching a welder. The FiTech Oxygen Sensor Bung Kit is the ultimate DIY-friendly solution for professional-grade AFR monitoring.

Converting to Electronic Fuel Injection (EFI) usually comes with one major headache: installing the wideband oxygen sensor. If you don’t own a TIG welder (or fancy paying a shop to do it), you’re usually stuck. Enter the FiTech Clamp-On Bung Kit—a robust, leak-free, and incredibly simple way to mount your O2 sensor in minutes.

Drill, Clamp, and Go

Designed for the enthusiast who values precision and convenience, this kit requires only a 14mm (9/16″) hole to be drilled into your exhaust pipe. The heavy-duty 304 stainless steel clamp then wraps around the pipe, sealing the bung perfectly against the exhaust. No warped pipes, no messy welds, and no need to drop the entire exhaust system.

Universal Fitment & Durability

Crafted from high-quality 304 stainless steel, this kit is built to withstand the high-heat, corrosive environment of a vehicle’s underbody. It is designed to be versatile, fitting the most common exhaust diameters found on classic cars, performance builds, and trucks. Whether you are running a 2″, 2.25″, or 2.5″ system, this bung provides a secure, airtight fit.

Essential for EFI Tuning

Whether you’re running a FiTech Go-EFI system, a Sniper, or a standalone ECU, an accurate oxygen sensor reading is non-negotiable. This kit ensures your sensor is positioned correctly in the exhaust stream, providing the real-time data your ECU needs to optimise fuel trim and performance.

Key Features:

• Zero Welding Required: Ideal for home mechanics and those with stainless steel exhausts where welding is difficult.

• 304 Stainless Steel Construction: Maximum corrosion resistance and longevity.

• High-Temperature Gasket: Includes a specialized gasket to ensure a 100% airtight seal, preventing false “lean” readings.

• Universal Compatibility: Fits exhaust pipe diameters from 2″ (50.8mm) up to 2.5″ (63.5mm).

• Standard Threading: Features the industry-standard M18 x 1.5mm thread, compatible with almost all wideband and narrowband O2 sensors.

Why Choose the FiTech Clamp-On Kit?

In the world of tuning, “air leaks” are the enemy. A poor weld can let air into the exhaust, tricking your sensor into thinking the engine is running lean. The FiTech Bung Kit uses a precision-machined seat and a high-duty clamp to ensure that the only thing your sensor reads is your exhaust gas.

Technical Specifications:

• SKU: 60012

• Material: 304 Stainless Steel

• Thread Size: M18 x 1.5mm

• Pipe Fitment: 2.0″ to 2.5″ (Standard Automotive Exhausts)

• Installation: Clamp-on (Requires 14mm / 9/16″ drill bit)

• Compatibility: All M18 threaded Oxygen Sensors (FiTech, Holley, Bosch, AEM)

FiTech have been manufacturing fuel injection and fuel delivery solutions since 2013 and have established themselves in the market as a serious performance contender, especially on big block racing and drag applications over 1000 horsepower. Their extensive range can cater for most custom fueling applications, which is backed by their new technical support department.