Description
The Mishimoto Weld-On Bung, part number MMEXH-WB18-AL, is a flat-style fabrication fitting machined from 6061 aluminum with an M18x1.5 metric thread. Built for the DIYer who needs to add a port to an existing system, this bung gives you a clean, weld-in mounting point without redesigning the whole assembly.
As a Mishimoto Fabrication component, this weld-on bung is engineered to let you securely integrate additional hardware onto virtually any vehicle system. The M18x1.5 metric thread size makes it a practical choice for installing boost gauges, wideband O2 sensors, and other performance-monitoring upgrades. Because it’s crafted from 6061 aluminum, it offers a lightweight yet strong base for your fabrication project, and its flat profile is designed for straightforward weld-on installation. Whether you’re building a custom intake, exhaust, or fluid system, this bung provides a reliable, purpose-built way to add a threaded port exactly where you need it.
Vehicle Applications
Mishimoto designed this weld-on bung for universal vehicle fitment rather than a single make or model. Its M18x1.5 metric thread and weld-on design allow it to be fabricated into a wide range of vehicle systems, giving DIY builders the flexibility to add sensor or gauge bungs to virtually any application that calls for this thread size.
Features
- Universal vehicle fitment — allows for additional components onto various vehicle systems
- Available in an M18x1.5 thread size
- Machined from 6061 aluminum, providing a blend of lightness and strength
- Flat-style bung designed for DIY weld-on installation
- Ideal for installing boost gauges, wideband O2 sensors, and other performance upgrades
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMEXH-WB18-AL
- Product Type: Fabrication
- Material: 6061 Aluminum
- Type: Flat
- Thread Size: M18 – 1.5 (M18x1.5)
- Thread Type Standard: Metric
- Includes: (1) Weld on Bung
- Warranty: Mishimoto Lifetime Warranty
Frequently Asked Questions
What material is the Mishimoto Weld-On Bung MMEXH-WB18-AL made from?
This weld-on bung is made from 6061 aluminum.
What thread size does this bung use?
It features an M18x1.5 (M18 – 1.5) metric thread size.
What is this weld-on bung used for?
It’s designed to be welded onto a vehicle system to add a mounting point for components such as boost gauges, wideband O2 sensors, and other performance upgrades.
How is the Mishimoto Weld-On Bung installed?
It is installed via a DIY weld-on process, making it suited for fabrication projects.
Does the Mishimoto Weld-On Bung come with a warranty?
Yes, it is backed by the Mishimoto Lifetime Warranty.
What does the package include?
The package includes (1) Weld on Bung.
âš WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.







