11-16 Duramax LML HSP 3.5" Mouthpiece

  • Sale
  • Regular price $230.00

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

Why Aluminum? 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.



Ask a Question
  • Why must the egr cooler be removed for this to fit? Are there any options for full emissions trucks? Thanks

    The larger size of the mouthpiece have issues with clearing the egr cooler. HSP told me that you will probably have some fitment issues with egr in tact

  • So does the egr cooler have to be removed to fit the new mouthpiece? Or have people installed the new mouthpiece with the egr cooler still in the truck?

    Yes this fits with egr cooler still in truck.

  • I see how it connects to the turbo but how does it connect to air intake side

    The stock silicone boot that attachs your intake system to your oem mouthpiece is used.

  • Does this work with the 5” intake

    Yes it will 

Customer Reviews

Based on 10 reviews Write a review