11-16 Duramax LML HSP 3.5" High Flow Mouthpiece

** 2-4 Week Build Time Normally**

New HSP Diesel 3.5" High Flow Turbo Horn Mouthpiece for 11-16 LML Duramax, 

With this Turbo Mouthpiece you will notice much more Turbo whistle compared to any plastic mouthpiece.

Will fit emissions intact or deleted.

Your choice of  powder coating. 

This high flow design deletes the resonator and reroutes the PCV, without the resonator and PCV holes in the mouthpiece it eliminates air turbulence within the mouthpiece for a faster smoother airflow channel getting you more air to the turbo!

Requires PCV reroute, you can do this easily by using a 3/4 hose, this will also benefit your truck by not getting oil build up in your intercooler.

This is a direct mouthpiece replacement, Fits stock or and aftermarket intake system.

Cannot ship to California