G&R Diesel Inc.

Our Billet Aluminum Bottom Sump with Integrated Fuel Return System completely eliminates the need to run the return of your aftermarket fuel pump to the top of the tank or cut into the fuel filler neck, therefore cutting install time tremendously! Key Features: -...

Billet aluminum connector that includes a double o-ring seal design and an OEM-style retainer clip. This connector adapts 3" intercooler piping to an OEM VGT type turbo. Solid aluminum heavy wall design resists crushing from clamp overtightening. 

Part # GRD73PS3001 These valve covers will work for a 1999 - 2003   Key Features: Compatible with: Engine & Engine Parts, Powerstroke

This billet rocker box will be the piece that sets off your late 5.9 or 6.7 Cummins build! Made from high quality 6061 aluminum and integrated steel bosses to eliminate any possibility of stripping out threads Key Features: - The rear of the rocker...

Our 6.7 Cummins Fuel Filter Conversion includes a large list of features to set it apart from the pack! This kit will work for a 2021 - 2024 6.7 Cummins! The billet aluminum filter head bolts directly into the same place as the factory...

Dual Rear CAT Fuel Filter Conversion Kit | 2019–2024 6.7L Cummins Engineered specifically for the 2019–2024 Ram 2500/3500 with the 6.7L Cummins, this dual rear fuel filter conversion kit eliminates the cost and hassle of OEM-style filters by converting your rear fuel/water separator location...

2007-2020 Cummins 6.7   GRD00170

With the growing need for more OEM drop in parts, we have developed a fuel filter bypass block for the 2010-2024 6.7 Cummins that does just that Key Features: - It is designed to directly replace the OEM engine mounted filter housing and still...

Part # GRD00226 Key Features: Compatible with: Engine & Engine Parts

Our CNC machined T4 turbo spacers are designed to help in gaining clearance between the turbo and manifold or pedestal depending on application Key Features: - With the included 3/8” fine thread ARP studs and 12 point nuts you can rest assured that you...

Complete T4 turbo mounting kit to eliminate that nagging factory VNT charger. Our billet 6.0 Powerstroke turbo pedestal is available for both S300 and S400 applications. The S400 variation is 1" taller for the larger compressor housing to clear the intake manifold. Most companies...

Our Tappet Cover w/ Oil Separator features an oil catch can with an internal baffle system that helps keep the oil inside the crankcase where it belongs! If your looking for a Tappet Cover, this will be the perfect setup for you! Key Features:...

Cummins utilized an engine block mounted fuel supply pump in the earlier 12 Valve Cummins engine. When replacing or upgrading to an electric fuel pump you are able to remove the block mounted by using this billet aluminum block plate Starting in 2006 and...

If you own a 12 valve or 24 valve Cummins and have thought it would be cool to be able to install the larger 6.7 Cummins intake horn… Key Features: - now you can! This intake plate will replace your current plate and will...

Our intake manifold flanges for the 5.9 Cummins are CNC machined in house from 6061 aluminum Key Features: - They are designed to fit a 3.5” OD tube and are multi axis machined to ensure proper air flow - This flanges are perfect for...

One of the most common issues on all 6.7 Powerstroke engines is failure of the CP4 fuel injection pump Key Features: - In recent years a CP4 Bypass Kit was developed then directly copied by multiple other companies within the diesel industry - After...

If you have an aftermarket fuel pump or filtration system, eliminating the engine mounted fuel filter is a must Key Features: - The plastic engine mounted filters are known to crack and spray fuel over the engine and many time resulting in a catastrophic...

This flange will fit a 2001 - 2016 Duramax Key Features: - This will fit a 3" downpipe exhaust - Part # GRD661028 Compatible with: Duramax, Exhaust

Looking to clean up the passenger side of your engine compartment? This is the perfect part! Installing our Coolant Riser Delete fitting lets you completely eliminate the coolant lines running along the passenger side of your engine Key Features: - This kit includes a...

Complete turbo oil drain and supply kit to plumb up an s300 or s400 turbo. This kit will work on any 2001-2016 Duramax, includes -10 braided stainless oil drain line with billet oil drain to rear engine cover adapter, turbo drain adapter, -6 braided...

Are you tired of the plastic cap seizing up and stripping or breaking when you go to remove it? This billet aluminum cap will take care of those issues and dress up your engine bay in the process. Our billet oil filter cap has...

Our Duramax oil drain line will work on any 2001-2016 Duramax. We use high quality braided stainless lines with billet aluminum adapters for both engine and turbo end of the lines. The turbo oil drain flange at the turbo has a high-quality O-ring seal...

Key Features: Compatible with: 6.0 T4 Turbo Oil Feed Line, Engine & Engine Parts, Powerstroke

ECM Mounting hardware kit to relocate the ECM for your VP44 Pump when using any of our billet tappet covers. When installing a billet tappet cover on a VP Pumped Cummins engine the ECM will need to be either relocated or mounted using other...

Dress up that old 12 valve with our billet aluminum individual valve covers! With extra clearance for valvetrain and studs, they will fit perfectly on your daily driver or hotrod! They are roughly .250 taller than the factory covers. We have tested these to...