2017–2025 Duramax L5P/L5D Throttle Valve Flange Adapter Upgrade | Boot & Clamp Conversion

2017–2025 Chevy / GMC Duramax 6.6L L5P Duramax Throttle Valve Upgrade (Flange Adapter Only)

Clean up the factory twist-lock charge-pipe connection at the intake throttle valve and convert it to a standard boot + clamp style connection for custom cold-side intercooler piping. This flange adapter is designed to interface with the OEM Y-bridge, helping you eliminate a well-known weak point in the L5P/L5D intake tract where leaks and connection issues can occur under boost.

What it does

• Replaces the OEM twist-lock piping interface at the intake throttle valve with a conventional coupler connection (boot + clamps) for custom/aftermarket cold-side piping.
• Allows your aftermarket cold-side pipe to connect to the OEM Y-bridge using a standard boot and clamp setup.

Features

• Solid aluminum construction (brand new part)
• Built for aftermarket intercooler piping setups where a boot/clamp connection is preferred over the factory twist-lock style

Fitment

• 2017–2025 GM 6.6L Duramax applications listed as L5P / L5D

Requirements / Compatibility (read before ordering)

• Must be used with custom/aftermarket intercooler boot connections.
• Will NOT work with the factory cold-side intercooler boot.

What’s included

• (1) Flange adapter only
• Does NOT include throttle body/throttle valve, intake manifold/Y-bridge, boots, clamps, or any intercooler piping.