Vibrant Union inYin Pneumatic Vacuum Fitting - for use with 3/8in (9.5mm) OD tubing

If you're setting up a custom vacuum or boost line system on your build, you need reliable connections that won't leak. This Vibrant Performance Union Y fitting is designed to make joining three 3/8-inch OD vacuum or pneumatic lines a straightforward process. It uses a one-touch push-lock design, meaning you just push the tubing in, and it locks securely in place, eliminating the need for messy hose clamps or zip ties.

The plastic construction is lightweight, and the threads come coated with PTFE to help ensure a good seal against the port. This fitting is built to handle air and boost lines, capable of withstanding pressures up to 150 psi, which is more than enough for most street applications. Once the tubing is inserted correctly, it's designed to be very difficult to pull back out, giving you confidence in your plumbing.

When you're routing multiple vacuum lines, like for a boost controller or a vacuum block, a Y-fitting like this simplifies the layout and keeps things tidy. Just make sure the tubing is cut cleanly and inserted straight for the best connection.