2015.5-2016 6.6L Duramax LML 5" Downpipe-Back CAT/DPF Delete Exhaust System For Silverado Sierra 2500/3500HD

LML 6.6 Duramax DPF Delete 5-inch Downpipe-Back Exhaust System

This 5-inch exhaust system (downpipe-back) for the 2015.5-2016 LML 6.6 Duramax is a high-flow exhaust upgrade solution for the new LML Silverado and Sierra HD pickup trucks. It features a factory-style 3-bolt flange configuration, providing 2015.5-2016 Duramax owners with a smoother, more durable, high-performance exhaust system.

Key Features

Designed specifically for 2015.5-2016 LML pickup trucks

This LML 6.6L Duramax 5-inch exhaust system (from header to tailpipe) is a perfect match for the original vehicle. Compatible with 2015.5-2016 Chevrolet and GMC pickup trucks, featuring a three-bolt flange turbocharger straight-through connection. This model-specific design is particularly important because there may be differences between 2015 models.

Larger 5-inch diameter for better exhaust flow

The system uses a 5-inch diameter exhaust pipe, which helps reduce exhaust drag compared to the factory compact exhaust system. Better exhaust flow helps improve engine breathing efficiency and provides more stable performance under high vehicle loads.

Mufflerless design, built for high-performance driving

The open downpipe design is designed to meet the needs of diesel vehicle owners who seek lower drag and a more powerful sound. Furthermore, it helps to expel exhaust gases more effectively during acceleration and heavy-load driving.

Stainless steel construction for durability

This exhaust system is constructed from T-409 stainless steel, capable of withstanding the various thermal cycles and operating conditions common in diesel vehicles. This material choice helps extend service life and ensures its reliability.

Thick-walled Construction

The 2mm thick pipe wall enhances the pipe's robustness, which is especially important for trucks used in demanding towing, off-road, or everyday driving conditions.

Compatibility Information

✅ Precisely Compatible

2015.5-2016 Chevrolet / GMC Heavy Duty Pickups

• Chevrolet Silverado 2500HD / 3500HD
• GMC Sierra 2500HD / 3500HD
• Equipped with a 6.6L Duramax LML diesel engine
• Crew Cab (Double Cab) Models
• Later LML models equipped with original 3-bolt flanges

❌ Incompatible

• Not applicable to 2011-2015 early model LMLs (V-band clamp version)
• Not applicable to Regular Cab (Standard Cab) Models
• Not applicable to Cab & Chassis (Chassis Cab Only) Commercial Vehicles

Important Note - Flange Type Verification: This system is only applicable to 2015.5-2016 late model LMLs equipped with 3-bolt flanges. If your 2011-2015 early model (V-band clamp), please purchase the corresponding V-band version. Please visually confirm the type of your turbine outlet flange before purchasing.