Will this lly egr delete kit fit my 2004 Duramax?

This kit is designed for the 2004.5-2005 LLY engine (VIN digit 2). If you have an early 2004 LB7 engine (VIN digit 1), this kit will not fit.

What is the benefit of the High-Flow Elbow over a simple block-off plate?

A basic block-off only stops soot. Our High-Flow Intake Elbow replaces the restrictive factory bridge, increasing airflow volume by nearly 35%, which is crucial for reducing EGTs during towing.

Does this 2005 duramax egr delete kit require tuning?

Yes. Any EGR removal on an LMM/LLY/LBZ requires ECU tuning to disable the sensors and prevent the Check Engine Light or "Limp Mode."

Is the installation difficult?

Estimated installation time is 2 hours. It is a direct bolt-on kit, but some factory bolts on the back of the engine can be time-consuming to reach.

Can I use this for street driving?

No. As per the legal disclaimer, this is strictly for off-road or closed-course competition use only.

2004.5-2005 6.6L Duramax LLY EGR Valve & Cooler Delete Kit with High Flow Intake Elbow for Silverado/Sierra 2500/3500 HD

Name: 2004.5-2005 6.6L Duramax LLY EGR Valve & Cooler Delete Kit with High Flow Intake Elbow for Silverado/Sierra 2500/3500 HD
Brand: Vigor Diesel
SKU: 8050EXP050UUS
Price: 117.77 USD
Availability: InStock

SKU: 8050EXP050UUS

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2004.5-2005 6.6L Duramax LLY EGR Valve & Cooler Delete Kit with High Flow Intake Elbow for Silverado/Sierra 2500/3500 HD

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Brand

Vigor Diesel

Type

6.6L EGR Valve & Cooler Delete Kit with High Flow Intake Elbow

AKA

Exhaust Gas Recirculation Delete Kit, EGR Block Off Plate & Coolant Bypass

Engine

6.6L V8 LLY Duramax Turbo Diesel ((VIN 8th Digit '2'))

Fitment

2004-2005 Chevrolet Silverado / GMC Sierra 2500 HD / 3500

Body Type

Pickup (not fit Cab & Chassis)

Material

6061 Billet Aluminum, Stainless Steel, Reinforced Rubber

Technique

CNC Machined, Painted, Mandrel Bent, TIG Welded With A Stack-of-dimes Finish

Condition

100% Brand New

✔High-Flow Elbow: Replaces the restrictive OEM intake bridge for maximum boost response.
✔Total EGR Removal: Eliminates both the failure-prone valve and cooler assembly.
✔Cooler Operation: Reduces EGTs and engine bay heat soak under heavy loads.
✔Premium Build: CNC-machined 6061 billet plates with a powder-coated high-flow tube.
✔Zero Soot Buildup: Ensures your intake manifold stays clean and carbon-free for life.
✔Direct Bolt-On: Specifically engineered for a perfect fit on 2004.5-2005 LLY engines.

6.6L Duramax LLY EGR Delete Kit with High-Flow Intake Elbow

Unlock the true potential of your 2004.5-2005 Chevy Silverado or GMC Sierra 2500HD/3500HD. This premium lly egr delete kit is more than a block-off; it is a complete intake overhaul. By replacing the restrictive factory air bridge with our mandrel-bent High-Flow Intake Elbow, you eliminate the notorious LLY "carbon choking" effect and provide a direct path for clean, cold air to reach your cylinders.

🚀 Performance & Reliability Highlights

✔35% Airflow Increase: Redesigned intake elbow optimizes the LLY intake path for better towing and heavy-load response.
✔Thermal Stress Reduction: Lowers temperatures ahead of the former EGR zone by approx. 20°C and engine bay heat by ~7°C.
✔Soot Elimination: This egr delete kit stops exhaust gas recirculation, preventing carbon buildup from clogging your intake system.
✔Long-Term Savings: Engineered to save up to $8.2k in maintenance over 300,000 miles while improving MPG by roughly 5%.
✔Premium Construction: CNC-machined 6061 billet aluminum, TIG-welded stainless steel, and 3-ply reinforced rubber.

LLY Transformation: Before vs. After EGR Delete

Metric	OEM Factory System	With Vigor Diesel Upgrade
Intake Airflow	Restricted by Factory Bridge	Improved by nearly 35%
EGR Zone Temp	High Recirculation Heat	Reduced by ~20°C
Engine Bay Heat	Trapped Thermal Load	Lowered by ~7°C
Fuel Economy (MPG)	Standard Performance	Approx. 5% Improvement

*Results based on off-road testing. Actual performance varies by tune, vehicle condition, and driving habits.

What's Included in Your Duramax EGR Delete Kit

1 × High-Flow Intake Elbow: Mandrel-bent and powder-coated black.
1 × EGR Block-Off Plate: Precision CNC-machined billet aluminum.
1 × Reinforced Rubber Hose: For reliable coolant bypass.

2 × Hose Clamps: Ensures a leak-free coolant seal.
1 × Mounting Bracket: For secure hardware positioning.
1 × Full Hardware Set: O-ring seal and all necessary mounting bolts.

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