SMC DOT Plug-In Expander

The SMC DOT Plug-In Expander is designed to step up your air line size from 1/4" PTC to 3/8" PTC, making it the perfect solution for upgrading airflow without replacing your manifold. Commonly used on manifolds with 1/4" ports, this fitting allows you to run larger 3/8" air lines to your air bags for improved performance.

With a simple push-to-connect design, installation is quick and hassle-free. Built to meet DOT standards, this fitting delivers reliable, leak-free performance for both daily drivers and high-performance air suspension setups.

Key Features:

• Converts 1/4" PTC ports to 3/8" PTC
• Ideal for manifolds with 1/4" ports running 3/8" air line
• Improves airflow and system performance
• Easy push-to-connect installation
• DOT approved for safe, road-ready use

A simple upgrade that makes a big difference in your air system’s performance and efficiency.