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Why Choose a 5" L5P Downpipe-Back Delete Pipe for Your 2017–2019 Sierra/Silverado?

The 5" Downpipe-Back Delete Race Pipe for 2017-2019 GMC Sierra & Chevy Silverado L5P 6.6L Duramax by DynoVox is designed for maximum exhaust flow and performance. This high-quality race pipe eliminates restrictive components, improving horsepower, torque, and fuel efficiency. Made from durable aluminized steel, it ensures long-lasting performance and corrosion resistance. Its precision-fit design allows for easy installation. Upgrade your L5P Duramax with DynoVox’s premium DPF delete race pipe for enhanced power and a deep, aggressive exhaust tone. Ideal for off-road and competition use, delivering superior performance and efficiency.

Compatibility

Crew cab short bed & crew cab long bed. Not fit the 3500/4500/5500 Cab & Chassis commercial style truck.

What are the Features and Benefits of the L5P Downpipe Back Delete Pipe?

The DynoVox 5" Downpipe-Back Delete Race Pipe is built for diesel truck enthusiasts who demand maximum performance, durability, and efficiency from their exhaust systems. Engineered to deliver superior results, this upgrade offers a range of features and performance advantages tailored specifically for the 2017–2019 GMC Sierra and Chevy Silverado 6.6L L5P Duramax.

1. High-Quality T-409 Stainless Steel Construction

Crafted from premium-grade T-409 stainless steel with a 2 mm wall thickness, this race pipe is built to withstand the extreme conditions of high-performance diesel engines. T-409 stainless steel offers excellent resistance to heat, corrosion, and road debris, ensuring long-lasting performance in demanding environments.

2. Corrosion Resistance and Aesthetic Finish

Each unit is rigorously tested for corrosion resistance, making it ideal for long-term use even in harsh weather or road conditions. The aluminized silver finish not only enhances durability but also gives the system a sleek, professional appearance that looks as good as it performs.

3. Significant Power Gains

By eliminating restrictive emissions components like the diesel particulate filter (DPF) and exhaust gas recirculation (EGR) system, the exhaust system unlocks substantial performance improvements. Users can expect an increase of 30 to 100 horsepower, depending on supporting modifications and tuning.

4. Improved Fuel Economy

The enhanced exhaust flow reduces engine backpressure, allowing the engine to operate more efficiently. This leads to noticeably improved fuel economy, helping drivers reduce fuel costs over time while maintaining powerful performance for towing, hauling, or off-road use.

5. Restores Engine Efficiency

Over time, factory emissions systems can cause excessive soot buildup and reduce engine performance. The DynoVox delete race pipe restores lost power and efficiency, giving your Duramax engine a new lease on life with smoother operation and quicker throttle response.

This system is ideal for off-road and race-use applications where emissions regulations allow component removal. It offers a reliable and effective solution for drivers looking to maximize their truck’s potential.

Why You Need This 5" Downpipe-Back Delete Pipe?

If you've experienced performance issues caused by a clogged Diesel Particulate Filter (DPF), you're not alone. Over time, the DPF can become increasingly restricted with trapped soot and ash, especially in vehicles that are used for towing, hauling, or frequent short trips. This buildup drastically reduces engine performance, limits exhaust flow, and causes your truck to struggle under load.

A common result of DPF clogging is a noticeable drop in power and a steep rise in fuel consumption—sometimes reaching as high as 13 to 14 miles per gallon. In severe cases, the truck may enter "limp mode" to protect the engine, limiting speed and power output and creating a frustrating, unsafe driving experience. This not only diminishes the reliability of your vehicle but could leave you stranded on the side of the road.

Installing the DynoVox 5" Downpipe-Back Delete Race Pipe allows you to permanently remove the restrictive DPF and restore your Duramax engine to its full potential. By eliminating the source of these recurring issues, you’ll experience consistent power delivery, improved fuel efficiency, and peace of mind knowing your truck is no longer vulnerable to DPF-related failures. This upgrade is essential for anyone looking to enhance performance and avoid the hassle and expense of ongoing DPF maintenance.

Installation And Debugger is required:

Installation typically takes about 1 hour using basic hand tools and can be done on the floor of your driveway or garage. Using a car lift may be faster. For vehicles with shorter wheelbase bed/cab configurations, some cutting may be required. This includes clamps, hangers, and hardware, but you may need to reuse some of the stock parts.
Deleting the DPF, CAT, SCR, and/or DOC requires eliminating emissions-related sensors. To avoid triggering a Check Engine Light or Diagnostic Trouble Code, a tuner with DPF Delete capability must be used.

Unlock True Performance — Order Now

Experience the full potential of your L5P Duramax with this 5" downpipe-back delete race pipe. Designed for maximum exhaust flow, reduced EGTs, and improved turbo response, this upgrade delivers serious power gains. Built for off-road performance enthusiasts who demand more. Limited stock — upgrade your ride today!

Brand DynoVox Tubing Size 5-Inch
Thickness 2mm Material T-409 stainless steel
Color Silver Finish Aluminized
Package Include Exhaust Pipe x 7 Clamp x 7 Warranty 5 Years
Installation Location Near the engine
Item Condition New

Warranty and Shipping Services

We provide a 5-year warranty and a 30-day free return and exchange service, so you have no worries. At the same time, you can enjoy fast and free shipping within the United States.

DISCLAIMER

1. By installing this product onto your vehicle, you assume all risk and liability associated with its use.2. It is your responsibility to make sure your Vehicle complies with all federal, state, and local emissions laws. Federal and many state and local laws prohibit the removal, modification, or rendering inoperative of any part of the design affecting emissions or safety on motor vehicles used on a public street or highway Violation may result in a fine of up to $ 32,500 per vehicle ( or possibly higher depending on changes in the law ). All civil penalties and fines for removing your vehicle emissions equipment are the sole responsibility of the end user.3. Due to its high-performance nature, this product may void the vehicle manufacturer's warranty.4. DynoVox is not responsible for the misuse of its products By installing this product, you release DynoVox of any liability associated with its use.5. Depending on where you live, restrictions may apply. Check all applicable laws before installing or using.6. The purchaser and end-user release, indemnities, discharges, and holds harmless DynoVox from any claims, damages, causes of action, injuries, or expenses resulting from or relating to the use or installation of this product that is in violation of the terms and conditions on this page, the product disclaimer, and/or the product installation instructions. DynoVox will not be liable for any direct, indirect, consequential, exemplary, punitive, statutory, or incidental damages or fines caused by the use.

Frequently asked questions
What are the benefits of deleting the L5P?
Advantages: removing costly components that are very expensive to repair and replace. Better fuel economy, engine longevity and simplicity. No more DEF to fill and you'll make a bit more power and it generally sounds better. Not having to worry about regen issues or DEF freezing is a big plus.
What does a downpipe do for a Duramax?
A downpipe in a Duramax diesel truck, particularly when upgraded, plays a crucial role in improving exhaust flow and performance. It connects the turbocharger to the rest of the exhaust system, and a restrictive factory downpipe can hinder turbocharger performance. Upgrading to a high-flow downpipe, often larger in diameter and sometimes removing the catalytic converter (catless), can result in faster turbo spool, reduced backpressure, lower exhaust gas temperatures (EGTs), and increased horsepower and torque, especially with tuning.
Is deleting a Duramax worth it?
Deleting a Duramax, specifically removing the EGR (Exhaust Gas Recirculation) and DPF (Diesel Particulate Filter), can offer performance and efficiency gains, but comes with significant drawbacks like legal risks and potential environmental impact. While some see it as a performance upgrade, others caution against it due to potential fines, warranty issues, and negative environmental consequences.
Do downpipes increase horsepower?
Yes. Performance catted downpipes nowadays have been shown to increase horsepower. An aftermarket downpipe with catalytic converters will add 10 to 20 horsepower on average, and that gain is noticeable anytime the turbo spools.
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