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. 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

SW # 0 : Half power

Easy to fasten even in freezing temperatures

Install the Unlock Cable and follow on-screen instructions on the GT

Installation requires modification to your OEM grille shell

the automatic

2 - 515300250 2

These units replace the old rusted and leaking stock exhaust manifolds that normally require extensive cleaning and machine work to be recovered from warping and distortion

➢  Adds Power: 10+% increase

Aftermarket supply pump required

Option: 360 6-pad

FMW and Billet Wheels

This kit includes a new 3