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    • Shop 1994-1998 12 VALVE CUMMINS
    • Shop 98.5-2002 24 VALVE CUMMINS
    • Shop 2003-2007.5 5.9 CUMMINS
    • Shop 6.7 CUMMINS 2007-2012
    • Shop 6.7 CUMMINS 2013-2018
    • Shop 6.7 CUMMINS 2019-2024
    • Shop 6.7 CUMMINS 2025-2026
  • Chevy/GMC Duramax
    • Shop LB7 DURAMAX
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    • Shop 7.3 POWERSTROKE
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NEW PRODUCTS!!

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G&R Diesel Inc. 6.7 Powerstroke Turbo compressor outlet connector showing metal fitting and hose connection for diesel engine upgradeG&R Diesel 6.7 Powerstroke turbo compressor outlet connector, durable metal fitting for diesel engine turbocharger system
G&R Diesel Inc. 6.7 Powerstroke Turbo Compressor Outlet Connector
Sale price$149.00
G&R Diesel Inc. 2025-2026 6.7 Cummins billet fuel filter bleeder cap, metal construction for diesel engine maintenance
G&R Diesel Inc. 2025-2026 6.7 Cummins Billet Fuel Filter Bleeder Cap
Sale price$599.00
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BEST SELLERS

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G&R Diesel 6.7 Cummins dipstick mounting bracket shown in black metal with mounting holes for engine installation.G&R Diesel 6.7 Cummins dipstick mounting bracket, sturdy metal bracket for engine oil dipstick installation.
G&R Diesel 6.7 Cummins Dipstick Mounting Bracket
Sale priceFrom $209.00
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G&R Diesel 06+ Cummins billet rocker box for engine valve train, high-performance metal component for durability and precision.G&R Diesel 06+ Cummins billet rocker box for engine valve cover, durable metal construction, detailed with mounting points.
G&R Diesel 06+ Cummins Billet Rocker Box
Sale price$679.00
G&R Diesel 6.7 Powerstroke upper fuel filter bypass block showing metal fitting and hose connection for diesel engine fuel system
G&R Diesel 6.7 Powerstroke Upper Fuel Filter Bypass Block
Sale price$249.00
G&R Diesel 6.7 Powerstroke dual rear fuel filter conversion kit with filters and mounting components for diesel engine maintenance.G&R Diesel 6.7 Powerstroke dual rear fuel filter conversion kit with filters and installation components for diesel trucks.
G&R Diesel 6.7 Powerstroke Dual Rear Fuel Filter Conversion Kit
Sale price$599.00
G&R Diesel 6.7 Cummins fuel filter and water separator conversion kit for 2013-2018 trucks, shown in image.
G&R Diesel 2013-2018 6.7 Cummins Fuel Filter/ Water Separator Conversion Kit
Sale price$499.00
G&R Diesel 6.7 Cummins fuel filter bypass block with integrated fuel heater, durable metal construction for diesel engine applicationsG&R Diesel 6.7 Cummins fuel filter bypass block with integrated fuel heater, shown in a close-up view of the metal component.
G&R Diesel 6.7 Cummins Fuel Filter Bypass Block w/ Fuel Heater
Sale price$299.00
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G&R Diesel 6.7 Cummins fuel filter and water separator conversion kit for 2019-2024 engine models, with filter components and fittings.
G&R Diesel 2019-2024 6.7 Cummins Fuel Filter/ Water Separator Conversion Kit
Sale price$499.00
G&R Diesel tappet cover with oil separator for engine maintenance, featuring durable construction and precise fit.
G&R Diesel Tappet Cover w/ Oil Separator
Sale price$399.00
G&R Diesel 6.7 Cummins cab and chassis rear CAT conversion kit, showing components and assembly for diesel engine upgrade.
G&R Diesel 6.7 Cummins Cab & Chassis Rear CAT Conversion Kit
Sale priceFrom $299.00
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G&R Diesel Duramax stock turbo drain line kit with black rubber hoses and metal fittings for diesel engine turbo drain system
G&R Diesel Duramax Stock Turbo Drain Line Kit
Sale price$199.00

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Products designed with years of experience in Diesel Performance

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Designed and manufactured in the USA

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We ship daily and most orders ship within 24hrs


G&R Diesel Inc. is an American diesel performance and parts company dedicated to building high-quality components for hardworking trucks. Founded by enthusiasts who understand what diesel owners expect from their equipment, G&R Diesel designs and manufactures parts that improve reliability, performance, and durability for Cummins, Duramax, and Powerstroke platforms. Every product is developed with real-world use in mind—whether the truck is used for towing, work, or everyday driving. With a focus on precision manufacturing, dependable fitment, and customer support, G&R Diesel is committed to providing diesel owners with parts they can trust.

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★ Reviews

Let customers speak for us

758 reviews
Write a review
73%
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(201)
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B
Duramax OEM Turbo Exhaust Outlet Flange
Brandon P.

Very happy with the quality. Highly recommend this product.

D
Fuel Line Quick-Connect Plug
Derek B.

Very impressed with the machining and finish. Shipping was quick too.

J
Powerstroke 1/4 NPT Swivel Oil Fill Cap
Jason P.

Excellent quality. Fit perfectly and solved my issue. Would definitely buy again.

Z
5/8 x 1" Billet Coolant T
Zach P.

Exactly as described. Installation was straightforward. Works exactly as it should.

J
6.7 Cummins Rear WIF Sensor Resistor Plug
Josh P.

Exactly as described. Installation was straightforward. Five stars.

123
Review picture
Brandon P.

Very happy with the quality. Highly recommend this product.

Duramax OEM Turbo Exhaust Outlet Flange
Review picture
Derek B.

Very impressed with the machining and finish. Shipping was quick too.

Fuel Line Quick-Connect Plug
Review picture
Zach P.

Exactly as described. Installation was straightforward. Works exactly as it should.

5/8 x 1" Billet Coolant T
Review picture
Jason P.

Excellent quality. Fit perfectly and solved my issue. Would definitely buy again.

Powerstroke 1/4 NPT Swivel Oil Fill Cap
Review picture
Josh P.

Exactly as described. Installation was straightforward. Five stars.

6.7 Cummins Rear WIF Sensor Resistor Plug
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