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It's up to you
the MPVI 3 is optional
This is done via one fuel pressure regulator off our hat controlling pressure supply to the factory high pressure pump
This means a stock C8 can hold an additional 150 to 170 horsepower and torque with stock clutches still installed
Stealth Module - Chevy/GMC Duramax LB7 6.6L (2001-2004) 2019 duramax It's up to you"Take your power back with the Stealth Module exclusively for (2001 2004) Chevy GMC Duramax LB7 diesel trucks. This module is a stand alone computer that is placed under the hood of your vehicle with no additional supporting modifications or monitoring necessary. Get the most out of your vehicle's performance while remaining warranty friendly. Works With: Duramax years: 2001, 2002, 2003, 2004 Chevy GMC Duramax diesel models: 2500, 3500, 4500 chassis,
