FITMENT
- 2004.5-2005 6.6L Chevrolet Silverado Duramax LLY 2500HD / 3500 HD.
- 2004.5-2005 6.6L GMC Sierra Duramax LLY 2500HD / 3500HD.
DESCRIPTION
Product Overview
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Combined soot and oil blow-by create ongoing maintenance issues and restricted airflow on 6.6L LLY Duramax trucks. Recirculated exhaust soot mixes with atomized CCV oil vapor inside the intake tract, creating dense sludge deposits that accumulate on intercooler walls, degrade rubber boots, and choke engine breathing.
- Protect your engine's complete air tract with this LLY CCV Reroute & EGR Delete Combo Package. By eliminating both exhaust soot recirculation and turbo oil ingestion in a single installation, it prevents power-robbing manifold buildup, preserves intercooler efficiency, and ensures your Duramax runs strictly on clean, fresh air.
Key Features
- Takes out the entire EGR cooler and valve assembly, ditching the heavy factory EGR valve and bypassing the cooler to rule out internal coolant leaks.
- Halts carbon sludge before it starts by cutting off both oil and soot at the source, leaving the turbo compressor wheel, intercooler lines, and intake runners clean and dry.
- Brings EGTs down and sharpens engine efficiency by eliminating hot exhaust gas recirculation, lowering combustion temperatures and opening up overall breathing.
- Blocks both contamination paths in one move, permanently sealing out abrasive exhaust soot and rerouting oily crankcase blow-by vapor away from the intake system.
FAQ
Q: Why do both an EGR delete and a CCV reroute need to be installed together on an LLY?
A: The CCV system introduces oil vapor while the EGR system recirculates soot, and the two combine to form carbon buildup inside the intake. Installing both together cuts that contamination and keeps the intake system cleaner.
Q: Is the 3" intake tube or the passenger-side up-pipe part of this kit?
A: This kit contains the high-flow intake tube to replace the restrictive factory intake bridge, but it does not include the passenger-side up-pipe. It is designed as a standalone EGR and CCV solution for the LLY engine.
Q: Will I need to cut or modify the factory coolant lines with this kit?
A: No. The kit comes with a pre-shaped high-temperature silicone bypass hose that connects directly to the factory coolant fittings, allowing a clean EGR cooler bypass without cutting the original lines.
Q: Is it possible to install this EGR and CCV kit without removing the turbo?
A: Yes. All components are made to be installed while the turbocharger remains mounted on the engine block. However, working clearance near the firewall is tight, so swivel sockets and long extensions are recommended.
