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$1,399.99
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2004.5-2005 GM 6.6L Duramax Dual Fueler Installation Kit without pump (Built To Order)

Pacific Performance Engineering

Bolt this kit on and your engine computer will automatically recognize both pumps and continue to deliver the precise amount of fuel your engine co...

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$1,399.99
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$1,245.99 - $1,435.98
$1,245.99 - $1,435.98
Current price $1,245.99

2004.5-2005 GM 6.6L Duramax High-Flow Exhaust Manifold and Up-Pipe Kit

Pacific Performance Engineering

High-Flow Exhaust Manifold and Up-Pipe Kit for 2004.5-2005 (LLY) GM 6.6L Duramax PPE High-Flow Manifold is made from high-sil moly cast iron. The P...

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$1,245.99 - $1,435.98
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$199.99
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2004.5-2005 GM 6.6L DURAMAX LLY FICM RELOCATION BRACKET

Pacific Performance Engineering

In a compound turbo set up, the FICM (fuel injection control module) on the passenger side valve cover is usually relocated to the center of the en...

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$199.99
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$219.99
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2004.5-2005 GM 6.6L Duramax LLY Zilla Carbon Fiber Turbo Inlet Upgrade

Pacific Performance Engineering

LLY Zilla Carbon Fiber Turbo Inlet The PPE Zilla Carbon Fiber Turbo Inlet Upgrade addresses the undersized, flow-choking section of the factory LLY...

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$219.99
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$499.99
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2004.5-2005 GM 6.6L Duramax OEM Length Replacement High Flow Up-Pipe Kit

Pacific Performance Engineering

Replacement High Flow Up-Pipe Kit The undersized OEM up-pipes are not corrosion resistant and introduce restrictions to the system, impairing turbo...

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$499.99
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$399.99
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2004.5-2005 GM 6.6L Duramax PCV Crankcase Breather Filter Kit

Pacific Performance Engineering

Duramax PCV Crankcase Breather Filter Kit Engine runaway can be caused by oil vapor that travels through the crankcase breathers and into the intak...

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$399.99
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$399.99
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2004.5-2005 GM 6.6L Duramax Replacement Up-Pipe (Passenger Side) for OEM Exhaust Manifold

Pacific Performance Engineering

All PPE OEM Up-Pipes create a 53% greater flow than stock. The PPE OEM Up-Pipes is a direct bolt-on to your factory manifolds. Unlike factory parts...

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$399.99
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2004.5-2005 GM 6.6L Duramax Replacement Up-Pipe (Passenger Side) for PPE Exhaust Manifold

Pacific Performance Engineering

This Up-Pipe works with the PPE performance exhaust manifold. This Duramax Up-pipe will give your GMC Sierra or Chevy Silverado significant reducti...

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$399.99
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$9,999.99
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2004.5-2005 GM 6.6L Duramax STAGE 1 Short-Block Custom Build

Pacific Performance Engineering

PPE has taken our advanced engineering knowledge and created Duramax diesel engine builds that are tailor-fit to your specific needs. Now you choos...

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$9,999.99
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2004.5-2005 GM 6.6L Duramax STAGE 2 Short-Block Custom Build

Pacific Performance Engineering

CUSTOM BUILDS AVAILABLE. CALL US AT (725) 238-2002 TO DISCUSS YOUR PROJECT NEEDS BEFORE PLACING ORDER. PPE has taken our advanced engineering knowl...

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2004.5-2005 GM 6.6L Duramax STAGE 3 Short-Block Custom Build

Pacific Performance Engineering

PPE has taken our advanced engineering knowledge and created Duramax diesel engine builds that are tailor-fit to your specific needs. Now you choos...

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$13,999.99
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$1,299.99
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2004.5-2005 GM 6.6L Duramax Stage4 Transmission Upgrade Kit - GM Allison

Pacific Performance Engineering

50 States Emissions Legal (E.O. D-701-18) PPE’s Stage4 transmission kit is our entry-level kit that’s perfect for drag racing, sled pulling, towi...

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$1,299.99
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$4,399.99
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2004.5-2005 GM 6.6L Duramax Stage5 Complete Ready-to-Install Allison Transmission 2WD

Pacific Performance Engineering

Now available as a complete ready-to-install transmission. PPE experts with 35+ years of experience upgrade the Allison transmissions with the late...

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$4,399.99
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$4,999.99
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2004.5-2005 GM 6.6L Duramax Stage6 Complete Ready-to-Install Allison Transmission 4WD

PPE Exclusives

Now available as a complete ready-to-install transmission. PPE experts with 35+ years of experience upgrade the Allison transmissions with the late...

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$4,999.99
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$1,599.99
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2004.5-2005 GM 6.6L Duramax Stage6G Transmission Upgrade Kit

Pacific Performance Engineering

50 States Emissions Legal (E.O. D-701-18)Built with top-level performance and heavy-duty use in mind, PPE’s Stage6G will handle whatever you can th...

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$1,599.99
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$9.99
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2004.5-2005 GM 6.6L Duramax Turbo Coolant Hose Small Diameter (10.0mm)

Pacific Performance Engineering

Time and under hood temperatures make the factory turbo coolant hose material brittle. Plus, if you replace your turbo or remove this small coolant...

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$9.99
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$79.99
$79.99 - $79.99
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2004.5-2005 GM 6.6L LLY Duramax PCV Breather Repair Kit

Pacific Performance Engineering

Specifically designed for the 2004.5 to 2005 LLY Duramax. This upgrade kit replaces the factory plastic valve cover breather system with CNC machin...

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$79.99
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$213.99
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2004.5-2005 GM 6.6L LLY Intercooler Piping Silicone Hose Kit

Pacific Performance Engineering

Intercooler Piping Silicone Hose Kit Each PPE Performance Silicone Hose is strengthened with 5 plies of Nomex reinforced fibers making them very to...

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$213.99
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Original price $82.95 - Original price $82.95
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$82.95
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2004.5-2005 GMC Sierra 2500HD 6.6L Duramax Diesel EGR Block Off Plates & Cooler Delete Kit

Black Path

Fitment 2004.5*-2005 Sierra 2500HD 6.6L LLY Duramax  *May of 2004.*Off-road use only, not for road vehicles. NOT LEGAL for use in pollution co...

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Original price $82.95 - Original price $82.95
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Original price $83.95 - Original price $83.95
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$83.95
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2004.5-2005 GMC Sierra 3500 6.6L Duramax Diesel EGR Block Off Plates & Cooler Delete Kit

Black Path

Fitment 2004.5*-2005 Sierra 3500 6.6L LLY Duramax  *May of 2004.*Off-road use only, not for road vehicles. NOT LEGAL for use in pollution cont...

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Original price $83.95 - Original price $83.95
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Original price $825.00
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Current price $817.99
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2004.5-2005 LLY Duramax 4in Intake Kit with Air Box Stage 2 Gloss Black

Wehrli
In stock

WCFab 2004.5-2005 GM LLY 6.6L Duramax Stage 2 Intake Kit with Air Box. This high flow, fabricated aluminum intake pipe and air box enclosure with d...

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Original price $825.00
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Current price $817.99
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Original price $300.00 - Original price $1,200.00
Original price $300.00
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$375.00 - $1,500.00
Current price $375.00

2004.5-2005 LLY Duramax Engine Tuning | EFI LIVE | PistonTwistin

Piston Twistin

LLY Duramax EFI Live Tuning Kit – Complete Custom DSP5 Solution Built by PistonTwistin | 2004.5–2005 Duramax Take your LLY Duramax to the next le...

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Original price $300.00 - Original price $1,200.00
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2004.5-2005 LLY Duramax Vane Position Sensor Connector Adapter

Garrett

2004.5-2005 LLY Duramax Vane Position Sensor Connector Adapter

Original price $109.99 - Original price $109.99
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Original price $300.00 - Original price $1,200.00
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Current price $375.00

2004.5-2005 LLY EFI LIVE CUSTOM TUNING ONLY

Piston Twistin

  Transform your LLY Duramax into a high-performance powerhouse with PistonTwistin’s precision-engineered, plug-and-play ECU tuning via EFI Live. 🚀...

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Original price $300.00 - Original price $1,200.00
Original price $300.00
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Current price $375.00