John C Garage

John C Garage Specializing in high quality Duramax Parts! We also sell Cummins and Powerstroke parts too.

Our main priority is having parts in stock and being able to ship orders as soon as possible!

Attention John C Garage customers 🗣️There will be no phone support Wednesday through Friday of this week. I will be chec...
06/16/2026

Attention John C Garage customers 🗣️

There will be no phone support Wednesday through Friday of this week. I will be checking emails periodically (which has always been the best method to contact us) and I have my brother shipping what he can while I’m out. Please expect some delays 🥲

We just received our first set of FBH Transmission billet valve covers for the L5P Duramax! Key Features:- Works with L5...
06/12/2026

We just received our first set of FBH Transmission billet valve covers for the L5P Duramax!

Key Features:
- Works with L5P Injectors and hold downs
- Made from billet 6061 aluminum
- Includes plastic funnel for easy maintenance
- Built in house at FBH Transmission in NE Iowa
- 2-3 week lead time on average

We are all caught up on our S369 L5P turbo orders as of today! We have two left from this last round ready to go 👊🏼 No l...
06/01/2026

We are all caught up on our S369 L5P turbo orders as of today! We have two left from this last round ready to go 👊🏼 No lead time on those, just sayinnn 😯😯

Fluidampr recommends to pin the damper to the crankshaft on Chevy/GM 6.6L Duramax diesel engines so they put together th...
05/28/2026

Fluidampr recommends to pin the damper to the crankshaft on Chevy/GM 6.6L Duramax diesel engines so they put together this kit! The kit includes press fit steel dowel pin, drill bit, and drill fixture for accurate alignment.

Features and Benefits

Secure mounting.
Recommended for Chevy/GM Duramax 6.6L

We now have inventory on hand to get these out with the dampers or if you have a damper already the kit can be sold by itself.

https://www.johncgaragepa.com/product-page/fluidampr-2001-chevy-gm-duramax-6-6l-damper-drill-pin-kit-300019

ALL-NEW, intake horn and grid heater kit for the 6.7L Cummins!! From the #1 trusted name in diesel performance comes t...
05/27/2026

ALL-NEW, intake horn and grid heater kit for the 6.7L Cummins!! From the #1 trusted name in diesel performance comes the most complete kit available to address the OEM grid heater nut nightmare. The direct replacement, factory appearing intake horn and high-flow intake plate increase overall engine airflow and replace the OEM style grid heater with a robust coil heating element. For our cold weather customers who experience sustained temperatures below 23°F (-5°C), our cold weather kit adds an additional heating element – together this combination provides for proven startability down to -35° Celsius! Protect your investment with confidence with the latest from Fleece Performance.

https://www.johncgaragepa.com/product-page/2007-5-2024-cummins-6-7l-fleece-performance-intake-and-grid-heater-kit

We have added 2024 and 2025 to our Can Bus offerings for the Duramax L5P which we have in stock and will continue to kee...
05/26/2026

We have added 2024 and 2025 to our Can Bus offerings for the Duramax L5P which we have in stock and will continue to keep on hand at all times. The two plugs for these years replace the DEF tank module.

I have an older y bridge kit available that I recently found while doing inventory!The y bridge and passenger side inter...
05/15/2026

I have an older y bridge kit available that I recently found while doing inventory!

The y bridge and passenger side intercooler pipe are illusion purple with the horn being semi gloss black powder coat. Everything shown in the first photo is 100% brand new items.

If you want a more complete kit, we can add intake/airbox, driver side intercooler pipe, up pipe, down pipe, etc.

Base kit includes,

High flow y bridge (illusion purple)
Passenger side intercooler pipe (illusion purple)
Coolant reroute kit
High flow intake horn (semi gloss black)
Silicone boots / clamps / Hardware

$1350 shipped within the U.S.

Any John C Garage LS fans? Not sure which is quicker, our single cab L5P or this 668HP Blackwing 🤔
05/11/2026

Any John C Garage LS fans? Not sure which is quicker, our single cab L5P or this 668HP Blackwing 🤔

Address

Philadelphia, PA

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+12676634201

Website

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