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The installation of a FASS fuel system on your Class 8 can be one of the most beneficial upgrades you can do
The MK-7 also replaces the restrictive factory supply line between the stock filter housing and the VP44 injection pump with upgraded high-flow fuel lines and fittings
Sure cure valve body calibration kit
All while keeping your quiet
Sick Diesel LED Power Grille Light Bar 20-23 GMC Sierra 2500/3500 AT4 GH-523 The installation of a FASSGive your GMC 2500 3500 AT4 a bold, factory inspired upgrade with this custom fit LED Grille Light Bar. Designed to install directly into the factory grille without cutting or modifications, it delivers a crisp white glow that enhances your truck's appearance while maintaining a clean OEM look. Built for year round durability, the IP67 rated housing is fully sealed against water, dust, road salt, and harsh weather, while the high quality LEDs are
