Merchant Automotive

Merchant Automotive Duramax Head Gasket, Fuel System & Allison Transmission Parts

At Thoroughbred Diesel, we proudly offer top-quality Merchant Automotive products, your trusted specialists in Duramax diesel performance and Allison transmission upgrades. Since 2001, our shop in Winchester, Kentucky has built a strong reputation in the diesel repair and performance market, providing hands-on expertise with Duramax-powered trucks and other popular diesel platforms. Our experienced techs have the know-how to help diagnose issues right over the phone—free diesel advice is just a call away at 859-737-4966. We carry the most in-demand Merchant Automotive parts, including the PCV valve kit, Allison 1000 spin-on transmission filters, deep transmission pan filters, and high-performance motor mounts. Whether you're upgrading or maintaining your diesel truck, we've got the Merchant parts and support you need to take it to the next level.

• Merchant Automotive Rubber Fuel Hose Kit - 06-10 Duramax
• Merchant Automotive Rubber Fuel Hose Kit - 01-04 Duramax LB7
• Merchant Automotive Head Gasket Kit LML
• Merchant Automotive Head Gasket Kit LLY, LBZ, LMM
• Merchant Automotive Rubber Fuel Hose Kit - 04.5-05 Duramax LLY
• Merchant Automotive Head Gasket Kit Grade C Gaskets, ARP Studs 2011-2016 GM Duramax 6.6L
• Merchant Automotive LB7 Injector Cup (SOLD INDIVIDUALLY)
• Merchant Automotive Head Gasket Kit ARP Studs and Grade C Head Gaskets 2004.5-2010 GM Duramax 6.6L Kit
• Merchant Automotive Rubber Fuel Hose Kit
• Merchant Automotive Head Gasket Kit
• Merchant Automotive Fuel Injector Return Line and Clip Set - 2004.5-2010 GM Duramax 6.6L LLY/LBZ/LMM
• Merchant Automotive Injector Harness Pigtail - 04.5-05 GM Duramax LLY
• Merchant Automotive Allison 1000 Transmission External Spin On Filter - 01-19 GM Duramax
• Merchant Automotive Rubber Fuel Hose Kit - 2011 Duramax
• Merchant Automotive LB7 Injector Install Kit
• Merchant Automotive Allison 1000 Pass Through Connector Seal and Body - 01-17 Duramax
• Merchant Automotive Fuel Injector Return Line and Clip Set with Metal Fittings | 2004.5 - 2010 GM 2500/3500 6.6L Duramax
• Merchant Automotive Deluxe Duramax Fuel Filter Head Rebuild Kit
• Merchant Automotive Turbo Install Gasket Kit - 04.5-05 GM Duramax LLY
• Merchant Automotive Turbo Install Gasket Kit - 06-07 GM Duramax LBZ
• Merchant Automotive Lower Radiator Pipe O-Rings At Radiator - 2007-2010 GM Duramax 6.6L LBZ/LMM
• Merchant Automotive Fuel Inlet to Filter Hose - 2006-2010 GM Duramax 6.6L LLY/LBZ/LMM
• Merchant Automotive Rubber Fuel Hose Kit - 12-16 Duramax
• Merchant Automotive ECM Terminal Ends - Allison 5 Speed TCM - 01-04 GM Duramax