FITMENT
- 2011-2015.5 6.6L Silverado & Sierra Duramax 2500HD/3500HD LML engine with a V-Band Clamp.
- Does NOT Fit 2015.5-2016 models equipped with the 3-bolt flange. Please check underneath your truck!
- Please physically inspect underneath your truck to verify your turbo discharge style before purchasing!
DESCRIPTION
Product Overview
- The factory emissions system on 6.6L Duramax LML engines can create multiple airflow and contamination concerns. The DPF system adds exhaust restriction and heat management demands, while the EGR system recirculates soot into the intake tract.
- The Duramax LML All-in-One Package designed to improve exhaust flow, reduce factory restrictions, and support better throttle response and reliability for modified LML applications.
Key Features
- High-Flow 4" Exhaust System: Replaces restrictive factory DPF exhaust components with mandrel-bent 4" piping and OEM-style hangers for improved airflow and easy installation.
- EGR Delete with High-Flow Intake: Removes the factory EGR cooler and upgrades restrictive intake components to support cleaner airflow into the engine.
- CCV Reroute System: Redirects crankcase vapors away from the intake tract, helping reduce oil contamination in turbo and intercooler components.
- Improved Performance & Efficiency: Reduces factory airflow restrictions, improves throttle response, and supports better towing performance for modified LMM Duramax applications.
- Pre-Loaded Mini Maxx V2 Tuner: Includes pre-configured tuning support for modified configurations, helping manage related diagnostics and optimize engine parameters after hardware upgrades.
FAQ
Q: Do I need to buy any extra hardware or software to complete the delete on truck?
A: No. This all-in-one package includes the main components needed for the upgrade, including the pre-loaded tuner, exhaust pipe, EGR delete components, and CCV reroute hardware. Additional supplies such as coolant or installation tools may be required depending on your truck’s condition.
Q: How do I identify if my 2015 Duramax LML is a 2015 or 2015.5 model?
A: Check the production date on the driver-side door jamb label and inspect your factory exhaust connection style. 11-15.5 LML trucks typically use a band clamp connection, while 15.5–16 models use a 3-bolt flange design. Verify your exhaust configuration before ordering to ensure proper fitment.
Q: Does the 2011–2015.5 Duramax LML require DEF fluid?
A: Yes. Unlike earlier LMM models, the 11–15.5 LML Duramax uses a factory DEF/SCR system. The included tuner and exhaust components are designed for modified LML emissions configurations.
Q: Does the tuner need to be installed before removing the factory emissions components?
A: Yes. Complete the ECU calibration first while the factory sensors and components are still connected. After successful programming, install the DPF/DEF pipe, EGR delete, and CCV components.
