6.6L LLY (2004.5-2005) Duramax

HSP LLY Y-Bridge Kit to Factory Cold Side for 2004.5-2005 Duramax Part Number: 206-HSP The 206-HSP HSP Max Flow Bridge to Factory Cold Side is a bolt-on LLY Y-bridge upgrade for 2004.5-2005 Chevrolet and GMC Duramax trucks. This LLY Duramax Y-bridge kit is designed...

HSP Max Flow Bridge to HSP Cold Side for 2004.5-2005 Chevrolet / GMC Duramax LLY Part Number: 206-1-HSP The 206-1-HSP, also known as the Max Flow Bridge to HSP Cold Side for the 2004.5-2005 LLY Duramax-equipped Chevrolet and GMC trucks, is a performance-enhancing upgrade...

HSP Cold Side Tube to Factory Bridge for 2004.5-2005 Chevrolet / GMC Duramax LLY The 205-HSP, also known as the HSP Cold Side Tube to Factory Bridge, is designed specifically for 2004.5-2005 LLY Duramax-equipped Chevrolet and GMC trucks. This cold side tube is perfect...

HSP Cold Side Tube to HSP Bridge for 2004.5-2005 Chevrolet / GMC Duramax LLY The LLY Duramax is known for its restrictive factory charge air system. After recognizing the potential power losses caused by the undersized OEM tubes, HSP upgraded the tubing to a...

HSP Max Flow Bridge and Cold Side for 2004.5-2005 Chevrolet / GMC Duramax LLY The 204-HSP, also known as the HSP Max Flow Bridge and Cold Side Tube, is built for the 2004.5-2005 LLY Duramax-equipped Chevrolet and GMC trucks. This upgrade improves airflow, enhances...

HSP Cold Air Intake for 2004.5-2005 Chevrolet / GMC Duramax LLY The 202-HSP, also known as the HSP Cold Air Intake for the 2004.5-2005 LLY Duramax-equipped Chevrolet and GMC trucks, is one of the first upgrades many owners install. HSP Diesel engineered this intake...

HSP One Piece Thermostat Housing Kit for 2001-2005 Chevrolet / GMC Duramax LB7 / LLY The 040-HSP One Piece Thermostat Housing Kit is designed for 2001-2005 Chevrolet and GMC Duramax LB7 and LLY trucks. This forward-facing thermostat housing is a major upgrade for trucks...

HSP Billet Thermostat Housing Kit W/Coolant return for 2001-2005 Chevrolet / GMC Duramax LB7 / LLY You should be running the forward-facing thermostat housing kit, with coolant return if you have a stock turbocharger in the valley. This coolant return has a provision to...

" HSP 2001-2010 CHEVROLET / GMC HOT SIDE INTERCOOLER TUBE The 000-HSP or Hot Side Intercooler Tube for the 2001-2010 Chevrolet and GMC trucks is a must-have for stock and modified trucks alike. The Hot Side Intercooler Tube is one of our best-selling parts...

HSP Turbo Inlet Max Flow Mouthpiece for 2004.5-2010 Chevrolet / GMC Duramax LLY / LBZ / LMM (for 4" Aftermarket Intakes) The factory turbo inlet mouthpiece not only lacks style it also restricts airflow and limits your engine's power potential. The HSP Max Flow Mouthpiece...

HSP Factory Replacement Coolant Tank for 2001-2007 Chevrolet / GMC Duramax LB7 / LLY / LBZ The 027-HSP, or HSP Factory Replacement Coolant Tank, is designed for 2001-2007 Chevrolet and GMC Duramax trucks. Its a perfect upgrade that delivers both function and style while...

HSP Billet Valve Covers for 2004.5-2010 Chevrolet / GMC Duramax Trucks The 046-HSP or HSP Billet Valve Covers are designed for the 2004.5-2010 Chevrolet and GMC Duramax-equipped trucks. These valve covers are perfect for both performance and street-driven trucks. If you want to enhance...

The HSP LLY, LBZ, and LMM Duramax PCV reroute kit replaces the restrictive factory crankcase ventilation hoses to improve airflow and eliminate oil vapor entering the turbocharger. Designed specifically for 2004.5-2010 Duramax diesel engines, this kit helps reduce oil residue, protect turbo components, and...

HSP 2004.5-2007 Chevrolet / GMC Cold Air Intake Bundle Part Number: 081-HSP The HSP Cold Air Intake Bundle is the perfect first step toward improving airflow and performance in your 2004.5-2007 Duramax-equipped Chevrolet and GMC truck. With upgraded components and a design that focuses...

The 046-1-HSP or 2001-2016 Chevrolet and GMC Billet Valve Covers Crank Case Ventilation Kit is something that we recommend for all of our Billet Valve cover kits. What is the Billet Valve Covers Crank Case Ventilation Kit? The Billet Valve Covers Crank Case Ventilation...

HSP Diesel Coated Billet Manifolds Why Would You Need the HSP Diesel Coated Billet Manifolds? The factory manifolds are restrictive from the get-go. HSP Diesel noticed quickly that these needed to be addressed if you wanted to make more power. The factory manifolds are...