6.6L LLY (2004.5-2005) Duramax

Are you looking for an increase in power without sacrificing drivability or reliability? Well, look no further than our 60% over fuel injectors!   The nozzles are enlarged using abrasive flow honing technology and are hydraulically flow matched to less than 1%. Each nozzle...

So, you're ready to push the limit of your build and want to find an injector you can trust to take you to the podium? With our background in OE development, manufacturing and pioneers of the performance common rail fuel systems, you can trust...

Have your original or aftermarket injectors left you stranded? Are you looking for an increase in power without sacrificing drivability or reliability? Well, look no further than our 45% over fuel injectors!   The nozzles are enlarged using abrasive flow honing technology and are...

So, you're ready to push the limit of your build and want to find an injector you can trust to take you to the podium? With our background in OE development, manufacturing and pioneers of the performance common rail fuel systems, you can trust...

So, you're ready to push the limit of your build and want to find an injector you can trust to take you to the podium? With our background in OE development, manufacturing and pioneers of the performance common rail fuel systems, you can trust...

Have your original or aftermarket injectors left you stranded? Are you looking for an increase in power without sacrificing drivability or reliability? Well, look no further than our 30% over fuel injectors!   At 30% over stock, these are an excellent upgrade for close...

So, you've made some power but now you want more? Do you still want good drivability while running more competitive events? Well, look no further than our 250% over fuel injectors!    The nozzles are enlarged using inhouse micro EDM (Electrical Discharge Machining) and...

So, you've made some power but now you want more? Do you still want good drivability while running more competitive events? Well, look no further than our 200% over fuel injectors!    The nozzles are enlarged using inhouse micro EDM (Electrical Discharge Machining) and...

So, you've made some power but now you want more? Do you still want good drivability while running more competitive events? Well, look no further than our 150% over fuel injectors!    The nozzles are enlarged using inhouse micro EDM (Electrical Discharge Machining) and...

Do you want to edge out that Mustang at the track or put another 5' on the next truck? Are you looking for an increase in power without sacrificing drivability or reliability? Well, look no further than our 100% over fuel injectors!   The...

Do you have an engine lope at idle or surging while driving? Are you seeing unusual rail pressure fluctuations? Your LLY Inlet Metering Valve may be the root cause.    Also known as the FCA (fuel control actuator) or the MPROP, this component can...

Are you losing rail pressure from a worn out CP3 pump? Are you in need of a factory replacement CP3 pump? Did you try a "parts kit" on your original pump with no fix? From stock up to 650+HP our Sportsman CP3 pumps are...

Looking for a  single CP3 pump that will support up 1000+HP and drive like stock? Do you want the capability of more power without the worry of a pump controller failing, a custom belt breaking, mount cracking, or even a second pump to worry...

Has your factory pump hit its limit, and you still need more pump capacity? Do you want the capability of more power without the worry of a multi-pump controller failing, a custom length belt breaking or a second pump to worry about? For applications...

One of the biggest pumps on the market with a track record to prove it. A single CP3 pump that will easily support 1200HP and in some applications have gone up to 1350+HP on fuel only! Don’t get caught with dual pump issues when...

Part # GRD661027 Key Features: Compatible with: Duramax, Engine & Engine Parts

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...

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

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...