6.6L Duramax CCV Reroute Kits (L5P, LML, LMM, LBZ, LLY)

Why Every Duramax Needs a CCV & PCV Reroute Upgrade

The factory Closed Crankcase Ventilation system is a silent engine killer. Recirculating oil-saturated vapors back into the turbo inlet, it creates a "sticky" film that traps soot, eventually choking your intake valves and causing boost leaks at the intercooler boots.

Our Duramax CCV PCV reroute kit options physically isolate this oil, routing it safely away from sensitive components.

Solving Real-World Concerns with Duramax CCV PCV Reroute Kit: From P04DB Codes to Arctic Temperatures

As a 20-year veteran of diesel performance, we address the nuances other shops ignore. Our L5P CCV upgrade, LML CCV reroute, and LLY/LMM/LBZ Duramax PCV reroute kits are engineered for the harshest conditions:

• The "Ice Plug" Risk in Cold Climates: Standard long-hose reroutes can freeze in -30°F weather, causing pressure to blow out your rear main seal. We provide high-flow, heat-resistant routing advice and specialized bypass designs to prevent condensation blockages in Northern regions.
• P04DB Fault Code Solutions: The L5P's complex sensors often trigger "Crankcase Ventilation System Disconnected" codes. Our L5P CCV reroute kits are designed to maintain proper pressure differentials, minimizing sensor errors even on non-tuned trucks.
• Odor & Drip Control: Concerned about cabin smell or oil spots on the driveway? We offer high-capacity catch can options for our LML CCV reroute, LMM, LBZ, and LLY PCV reroute kit setups, ensuring your garage stays clean while your engine stays healthy.

Best Duramax CCV PCV Reroute Kit: Generation-Specific L5P, LML, LMM, LBZ, & LLY Solutions

We carry precision-engineered hardware for every 6.6L V8 platform:

• 2004.5-2010 (LLY, LBZ, LMM): Our LLY PCV reroute kit, LBZ PCV reroute, and LMM PCV reroute kit eliminate the restrictive factory box, freeing up engine bay space for larger turbo mouthpieces.
• 2011-2016 (LML): The LML CCV Reroute & Resonator Delete Cap combo is our top seller, removing both the oil mist and the unsightly plastic "6.6" noise-canceling box in one shot.
• 2017-2024+ (L5P): Our premium L5P CCV re-route kit features CNC-machined billet plugs and O-ring seals that withstand the high-vibration environment of the newest heavy-duty trucks.

Why Choose EGR Performance?

• Decade of R&D: Precision-engineered Duramax performance solutions, far beyond basic "hoses and clamps."
• Premium Materials: CNC-machined T6061 billet aluminum, Viton O-rings, and collapse-proof reinforced hoses.
• Heavy-Duty Ready: Built specifically for the rigors of long-haul towing.
• Total Support: Includes a 1-year warranty, free shipping, and 24/7 technical assistance.

⚠️ Legal Disclaimer: All Duramax CCV reroute kits and PCV bypass components are intended strictly for off-road, racing, or agricultural use only. Check your local emissions regulations before installing a 2004-Present Duramax CCV PCV reroute on public highways.

Frequently Asked Questions: Duramax CCV & PCV Reroute

Q: Will an L5P ccv reroute kit trigger a check engine light?

A: While the L5P is sensitive to crankcase pressure, our L5P CCV reroute is designed to minimize the risk of the P04DB fault code. While most trucks run code-free, we recommend pairing the reroute with a performance tuner for 100% electronic transparency.

Q: What is the difference between a CCV delete and a catch can?

A: A Duramax CCV reroute kit typically vents vapors to the atmosphere (ground), while a catch can filters the oil and returns "cleaned" air to the intake. For maximum turbo protection on an LML CVR reroute, or LMM Duramax PCV reroute kit, venting to the atmosphere is the most effective way to keep your intake 100% dry.

Q: Do I need a resonator delete cap for my LML?

A: It is highly recommended. When installing an LML PCV reroute kit, the factory resonator box becomes a useless "eye-sore" that can crack and cause filtered air leaks. Our LML CCV Reroute & resonator delete cap provides a cleaner look and improved induction sound.

Q: Is it safe to run a PCV reroute lmm or lbz in the winter?

A: Yes, but with precautions. If you live in a sub-zero climate, ensure your routing hose is as short as possible and avoid "U-bends" where water can pool and freeze. Our LBZ Duramax PCV reroute and LMM PCV reroute kits include heavy-duty hoses designed to resist thermal cracking.

Q: Does a Duramax CCV reroute void my warranty?

A: Installing a Duramax CCV reroute kit may potentially void parts of your factory warranty if it's considered an emissions-related modification, so always check with your dealer or manufacturer beforehand to confirm.

Q: How often should I empty my catch can?

A: You should check and empty your catch can every 3,000 to 5,000 miles, or more frequently if you're towing heavy loads, driving in hot climates, or noticing faster buildup.

Q: Will rerouting my Duramax CCV PCV improve fuel economy?

A: Yes, rerouting your Duramax CCV PCV can improve fuel economy by maintaining a cleaner intake system, leading to more efficient combustion and reduced power loss from oil contamination.

Q: Is vent-to-atmosphere legal in my state?

A: Vent-to-atmosphere CCV systems are often not legal for street use in states with strict emissions regulations like California (under CARB rules), so verify your local laws—opt for closed-loop systems if compliance is required.