6.6L LML Duramax 4" DPF Delete Race Pipe with 3-Bolt Flange for 2015.5-2016 Chevy Silverado & GMC Sierra 2500HD 3500HD

SKU: XKV51057
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Fitment & Specs
Fits listed 2015.5-2016 Chevy Silverado and GMC Sierra 2500HD and 3500HD pickup trucks with the 6.6L LML Duramax engine and late-style 3-bolt flange connection. Does not fit earlier V-band applications.
4" Inlet
T-409 Stainless Steel ¡ Application-Specific Pipe Installation; Cutting or Trimming May Be Required; Professional Installation Recommended
Before You Buy: Off-road/racing use only ¡ Professional install recommended ¡ Verify Compatible Tuning Requirements Before Installation
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Description

This 4-inch DPF delete race pipe is designed for listed 2015.5-2016 Chevrolet Silverado and GMC Sierra 2500HD and 3500HD pickup trucks equipped with the 6.6L LML Duramax diesel engine and late-style 3-bolt flange connection.

Constructed from T-409 stainless steel with a 1.5 mm wall thickness, the pipe features mandrel-bent tubing and an application-specific 3-bolt flange configuration. Visually verify the vehicle's front exhaust connection before purchase, as this product does not fit earlier V-band applications.

Key Details

  • Fitment: Listed 2015.5-2016 Chevrolet Silverado and GMC Sierra 2500HD / 3500HD pickup applications
  • Engine: 6.6L LML Duramax Diesel
  • Product Type: DPF Delete Race Pipe
  • Pipe Diameter: 4.0"
  • Inlet Diameter: 4.0"
  • Wall Thickness: 1.5 mm
  • Material: T-409 Stainless Steel
  • Construction: Mandrel-Bent Pipe
  • Front Connection: Late-Style 3-Bolt Flange
  • Installation: Professional installation is recommended

Fitment

This product is limited to the late-style 3-bolt flange applications listed below. The year alone is not sufficient to confirm fitment because 2015 is a split production year.

Vehicle Year Engine Required Connection
Chevrolet Silverado 2500HD / 3500HD 2015.5-2016 6.6L LML Duramax Diesel Late-Style 3-Bolt Flange
GMC Sierra 2500HD / 3500HD 2015.5-2016 6.6L LML Duramax Diesel Late-Style 3-Bolt Flange
Fitment Note: 2015 is a split production year. Earlier 2011 through early-2015 LML applications generally use a V-band-style connection, while the listed 2015.5-2016 applications use a 3-bolt flange connection. This SKU is for the late-style 3-bolt flange configuration only. Visually inspect the connection on the vehicle before purchase.

Installation Guide

The installation document below covers the broader LML platform and may reference both V-band and 3-bolt connection configurations. For XKV51057, follow only the instructions applicable to the late-style 3-bolt flange version.

View the LML 4" DPF Race Pipe Installation Guide

Package Includes

DPF delete race pipe components and installation hardware are supplied as shown in the product images. Review the product photos and compare all received components before beginning installation.

Installation Notes

  • Professional installation is recommended.
  • Visually verify the late-style 3-bolt flange connection before ordering or beginning installation.
  • Confirm compatible tuning or ECU calibration requirements before installation and vehicle operation.
  • Tuning, programming, or ECU calibration is not included with this product.
  • Cutting or trimming may be required depending on the wheelbase and factory exhaust configuration.
  • Verify the factory exhaust routing, sensor configuration, mounting points, pipe connections, and underbody clearance before installation.
  • Test fit all pipe sections, hangers, clamps, and connection points before final tightening.
  • Factory hardware may need to be reused depending on the vehicle and installation configuration.
  • Existing exhaust modifications, previous repairs, corrosion, or non-factory components may affect installation.
  • Inspect all connections for exhaust leaks after installation and recheck clamps and fasteners after the initial heat cycles where appropriate.

Before You Buy

  • This product fits listed 2015.5-2016 Chevrolet Silverado and GMC Sierra 2500HD / 3500HD pickup applications with the 6.6L LML Duramax engine and late-style 3-bolt flange.
  • This product does not fit earlier 2011 through early-2015 V-band connection applications.
  • This is a 4-inch DPF delete race pipe. It is not a complete exhaust system, cat-back exhaust, downpipe, EGR delete kit, tuner, or universal exhaust pipe.
  • Verify the exact year, model, engine, cab configuration, bed length, wheelbase, flange style, factory exhaust layout, sensor setup, mounting points, package contents, and tuning requirements before purchase.
  • This product removes or replaces emissions-related exhaust components.
  • This product is not represented as street legal, emissions-compliant, CARB-compliant, or legal for public-road use.
  • Sale, installation, and use must comply with all applicable federal, state, and local laws.
  • Horsepower, torque, fuel economy, exhaust temperature, turbo response, reliability, and drivability changes are not guaranteed and may vary by vehicle condition, calibration, installation, and supporting components.
Shipping & Return

SHIPPING & DELIVERY
Fast Processing & Reliable Transit

  • Processing: Orders are processed and shipped from the nearest available warehouse within 1 business day after payment.
  • Delivery: Estimated delivery time is approximately 3–4 business days after shipment.
  • Shipping - Free shipping on all orders within the contiguous 48 U.S. states.

RETURNS & EXCHANGES
30-Day Hassle-Free Policy

  • Return Window: We offer a 30-day return policy from the date of delivery.
  • Item Condition: Returned items should be unused, uninstalled, and in their original packaging when possible.
  • Return Process: To initiate a return or exchange, please contact our customer service team first to receive authorization and instructions.

WARRANTY
2-Year Limited Replacement Warranty

  • Duration: All products are backed by a 2-year limited warranty.
  • Coverage: This warranty covers manufacturing defects and product failures under normal use, and provides a replacement for qualified cases (repairs are not performed).

CUSTOMER SUPPORT
We’re Here to Help – Contact Us First

  • Priority Contact: For any order-related issues—including returns, warranty claims, or general inquiries—please contact us first before taking further action. We are committed to resolving your concern promptly.
  • Feedback Notice: If you are unsatisfied, we kindly ask that you allow us an opportunity to address the issue before leaving neutral or negative feedback.
  • Email Support: You can reach us at support@XKVracing.com.

What Is a DPF and Why Is It Used?

A Diesel Particulate Filter (DPF) is part of the emissions system found on many modern diesel vehicles. Its job is to capture soot and particulate matter from the exhaust before it exits the vehicle.

Depending on driving habits, operating conditions, and mileage, a DPF system can gradually become restricted as soot accumulates. Over time, this may affect how the vehicle operates and how often maintenance is required.

Common signs associated with DPF-related restrictions can include:

Frequent regeneration cycles

Warning lights or reduced performance modes

Increased exhaust back pressure over time

Maintenance or replacement considerations on high-mileage vehicles

About DPF Replacement Components

DPF-related exhaust components are typically intended for specific use cases such as off-road applications, racing vehicles, export markets, or as part of a complete emissions system service or replacement process.

These components are designed to work with compatible exhaust configurations and should only be installed and used in compliance with applicable local, state, and federal regulations.

Who Should Consider This Type of Product?

Off-road or competition vehicle owners

Vehicles used in controlled environments

Export or non-U.S. applications

Customers performing emissions system service or replacement

FAST SHIPPING

Ships within 1 business day after payment
3–4 business day delivery

Secure and reliable Checkout

Secure checkout with major payment options

LOCAL WAREHOUSE

Orders ship from U.S. warehouses when available

Easy Returns and Exchanges

30-day returns for eligible unused items

Parts Warranty

Warranty support for qualified manufacturing defects

Important Notice

Products in this category are intended for off-road, racing, or closed-course use where emissions laws apply. They are not represented as street legal, emissions-compliant, CARB-compliant, or legal for use on public roads unless explicitly stated.

DPF delete, CAT delete, race pipe, or related diesel exhaust products may remove, replace, disable, or alter emissions-related components, including but not limited to DPF, catalytic converter, SCR, DOC, EGR, sensors, or related factory systems. Compatible tuning, calibration, or supporting modifications may be required to avoid engine codes, limp mode, regeneration issues, or drivability problems.

Professional installation is recommended. Buyers are responsible for verifying vehicle compatibility, local regulations, emissions requirements, sensor configuration, exhaust layout, and any required tuning or supporting modifications before purchase and installation.

Performance gains, sound changes, airflow changes, temperature changes, fuel economy changes, reliability results, fitment, and drivability results may vary. No specific performance gains, fuel economy improvements, or long-term reliability results are guaranteed.

DPF Delete & Race Pipe FAQs

What is a DPF delete pipe? +

A DPF delete pipe is an exhaust component designed to replace or bypass the factory Diesel Particulate Filter section on compatible diesel vehicles. Product design and included components vary by SKU, vehicle platform, exhaust layout, and emissions configuration.

What is the difference between a DPF delete pipe and a CAT delete race pipe? +

A DPF delete pipe relates to the Diesel Particulate Filter section, while a CAT delete or race pipe may relate to the catalytic converter section or a combined emissions-related exhaust section. Some products replace multiple factory components. Always check the product title, fitment table, package list, and installation notes before ordering.

Do DPF delete products require tuning? +

Compatible tuning or calibration is typically required when the DPF, catalytic converter, sensors, or related emissions components are removed, replaced, disabled, or altered. Without the required supporting calibration, the vehicle may trigger warning lights, engine codes, limp mode, regeneration issues, or drivability problems.

Are DPF delete pipes street legal? +

DPF delete, CAT delete, and race pipe products may alter or disable factory emissions-related equipment and are generally intended for off-road, racing, or closed-course use where emissions laws apply. They are not represented as street legal, emissions-compliant, CARB-compliant, or legal for public road use unless explicitly stated. Buyers should check applicable regulations before purchase and installation.

Will a DPF delete increase horsepower or torque? +

Horsepower, torque, throttle response, towing performance, and exhaust gas temperature results are not guaranteed. Results vary by vehicle condition, tuning, installation quality, fuel, turbo setup, exhaust configuration, supporting modifications, and use case.

Will a DPF delete improve fuel economy? +

Fuel economy changes are not guaranteed. Any change depends on tuning, driving style, load, gearing, vehicle condition, tire size, exhaust configuration, and supporting modifications. No specific MPG improvement is promised.

Will a DPF delete trigger a check engine light? +

It may. Removing, replacing, disabling, or altering DPF, CAT, SCR, DOC, sensor, or regeneration-related components can trigger warning lights, engine codes, limp mode, or drivability issues without compatible tuning or calibration. Always verify the required supporting calibration before installation.

Is a DPF delete the same as an EGR delete? +

No. A DPF delete relates to the Diesel Particulate Filter section of the exhaust system, while an EGR delete relates to the Exhaust Gas Recirculation system. Some vehicle builds may involve multiple emissions-related components, but each product should be verified by its own fitment, package list, and tuning requirements.

Can I install a DPF delete pipe myself? +

Installation difficulty varies by vehicle and exhaust layout. DPF-related exhaust products may involve rusted hardware, heavy exhaust sections, sensors, clamps, flanges, tight underbody clearance, and required tuning or calibration. Professional installation is recommended.

Does every DPF delete kit include the same parts? +

No. Package contents vary by vehicle and SKU. Some products may include a single race pipe, while others may include clamps, hangers, adapters, sensor provisions, gaskets, or related hardware. Always check the product photos, package list, and fitment notes before ordering.

What should I verify before buying a DPF delete or race pipe? +

Verify your year, make, model, engine, emissions configuration, exhaust layout, pipe diameter, cab and bed configuration, sensor setup, tuning or calibration requirements, included components, and applicable regulations before purchase.