2017–2025 Chevy / GMC Duramax 6.6L L5P CCV Reroute / Delete Kit

Address one of the most common weak points on the L5P Duramax with this heavy-duty CCV reroute / delete kit, designed to improve reliability, reduce intake contamination, and eliminate failure-prone factory components.

The factory L5P CCV system routes hot, oil-laden crankcase vapors back into the intake tract, introducing unwanted heat and oil residue while relying on plastic components that are known to crack over time. This upgraded system replaces those weak links with durable aluminum components and high-temperature rubber hoses, providing long-term reliability in towing, performance, and high-load applications.

Integrated dual differential drop separators within the CCV block improve oil separation efficiency by allowing heavier oil droplets to fall out of the vapor stream before venting, significantly reducing oil carryover. By rerouting the CCV system away from the intake, this kit helps maintain a cleaner charge-air path while preventing hot crankcase air from being reintroduced into the engine.

The redesigned layout also removes the CCV from the factory oil fill neck, eliminating a known leak and failure point while providing a safer, more accessible front-mounted oil fill location.

Key Features & Benefits

• Eliminates hot, oil-contaminated CCV vapors from entering the intake system
• Replaces failure-prone factory plastic CCV components
• Constructed from aluminum alloy components with high-temperature rubber hoses
• Integrated dual differential drop separators for improved oil vapor separation
• Helps maintain a clean intake track and charge-air system
• Reduces heat re-circulation into the intake under load
• Separates CCV system from the oil fill port for improved safety and reliability
• Provides a cleaner, more serviceable engine bay layout
• Built for towing, performance, and long-term durability

Vehicle Fitment

• 2017–2025 Chevrolet / GMC Duramax 6.6L L5P
• 2500HD & 3500HD pickup trucks
• Does NOT fit cab-and-chassis commercial models and/or L5D.

FAQ: Can this CCV reroute / delete kit be used on a deleted truck?

Yes. This CCV reroute / delete kit is fully compatible with trucks that have had DPF, DEF, and EGR deletes. It is a mechanical crankcase ventilation upgrade and does not interfere with emissions delete hardware.

FAQ: Does this kit affect tuning or require tuning changes?

No. This kit has no interaction with the ECU or TCM and does not affect tuning in any way. No tune changes, updates, or recalibration are required. It is a physical modification only.

FAQ: What does this CCV kit actually do?

This kit reroutes crankcase blow-by vapors away from the intake system, reducing oil contamination and heat in the charge-air path. It improves long-term reliability and eliminates common factory CCV failure points without changing engine calibration.

FAQ: Can this be installed on stock or tuned trucks?

Yes. This CCV kit can be installed on stock, tuned, or fully deleted trucks. It operates independently of the engine management system and complements performance and reliability upgrades.