Fay Diesel Performance

Fay Diesel Performance General Maintenance, Engine Performance Upgrades, Suspension work, and Exterior Mods. We've got your Diesel needs covered!

A before and after photo of this full pusher piping kit, installed on this 2021 6.7 Powerstroke as well as an egr delete...
08/15/2026

A before and after photo of this full pusher piping kit, installed on this 2021 6.7 Powerstroke as well as an egr delete. The pusher Bronze powder coat goes beautifully with the red on this truck!!

A little before and after of the front end of this 2025 Silverado 2500HD after installing a Kryptonite Products stage 3 ...
01/16/2026

A little before and after of the front end of this 2025 Silverado 2500HD after installing a Kryptonite Products stage 3 leveling kit. This kit was fitted with the Fox 2.0 shocks which were installed in the rear as well, Leveling torsion keys, and Upper control arms. What's special about these control arms is the different ball joint angle on them which allows more suspension travel and more room to turn the torsion keys to lift the front of the truck up.

I had the pleasure of installing a Banks Power monster ram intake manifold and grid heater upgrade to this 2015 Cummins....
10/26/2025

I had the pleasure of installing a Banks Power monster ram intake manifold and grid heater upgrade to this 2015 Cummins. The photos show a before and after photo of the install, as well as the huge difference between the Oem intake and the banks monster ram intake. Not only does this kit allow your motor to breath more and gain a little power and torque it also completely gets rid of the deadly grid heater bolt that these trucks came with. We got this customers truck looking and running nice, and no more worries of the grid heater bolt causing engine failure!

Here we have a 2025 Chevy Silverado 2500hd that I had the pleasure of working on, looking good at night with its new cab...
10/24/2025

Here we have a 2025 Chevy Silverado 2500hd that I had the pleasure of working on, looking good at night with its new cab lights and mirror lights from Boost Auto

-Smoked switchback mirror lights.
-Universal black cab lights, running light only.

Both equipped with start up sequence.

Hello everyone, my names Colin Fay and I am the owner of Fay Diesel Performance. I Just want to make a quick post showin...
10/24/2025

Hello everyone, my names Colin Fay and I am the owner of Fay Diesel Performance. I Just want to make a quick post showing my passion to not only work on customer vehicles but also my own, as well as modifications we are capable of.
Here is my 2019 Chevy Silverado 2500hd L5P Duramax. The first two pictures show what the truck looked like when I had first bought it. The last couple show its current state with all of the modifications I have done. Which includes,

-Boost auto S-series cab lights
-Full LED bulb swap with switchback marker lights (headlights)
-Tuned and Deleted with Down pipe and 5” exhaust
-Bilstein 5100 shocks front and rear
-Kryptonite 2.5” leveling keys
-1.4” John C Garage lowering shackles
-Tow mirrors with smoked switchback lights
-Paint matched front and rear chevy badges
-2” Spacers
-35” Tires
-Chrome housing headlights with clear markers
-Wherli Fab 4” cold air intake in candy teal
-Wherli Fab upper coolant pipe in candy teal

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Hudson, NH
03051

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