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Tired of backpressure issues that reduce turbo efficiency and fuel economy?
The factory exhaust system on the 2011–2015 Chevy/GMC Duramax Diesel 6.6L LML is often restrictive, leading to excessive backpressure that negatively impacts turbocharger performance and overall engine efficiency. High backpressure not only delays turbo spool-up but also contributes to increased exhaust gas temperatures and reduced fuel economy—factors that can compromise the longevity and performance of your engine.
6.6 LML Downpipe-Back Exhaust Pipe for 2011-2015 Chevy/GMC Duramax
The DynoVox 5" Downpipe-Back Exhaust Pipe for 2011-2015 Chevy/GMC Duramax Diesel LML 6.6L Pickup Trucks is designed to enhance exhaust flow, improve performance, and boost horsepower. By eliminating restrictive factory components, this exhaust system reduces backpressure, enhances turbo efficiency, and provides a deep, aggressive exhaust tone. Built with durable, high-quality materials, it ensures long-lasting performance and reliability for off-road applications.
Vehicle Compatibility:
The 2015 model year is special. 2011-2015 downpipes use a v-band clamp to connect to the turbo straight-through pipe, while 2015.5-2016 models use a 3-bolt flange. Be sure to check the style of clamps your truck is equipped with.
Key Features & Benefits:
1. Increased Horsepower & Torque
By replacing the restrictive factory downpipe and exhaust components, this 5” downpipe-back pipe reduces exhaust backpressure, allowing your engine to breathe freely and produce more power.
2. Improved Exhaust Flow
Crafted with mandrel-bent tubing and high-quality stainless steel, it ensures smooth, unrestricted exhaust gas flow from the turbo to the tailpipe, enhancing turbo spool and throttle response.
3. Aggressive Exhaust Sound
Experience a deeper, more aggressive exhaust tone that enhances your truck’s presence without excessive noise, perfect for daily driving and performance use.
4. Durable Construction
The DynoVox 5-inch Exhaust is made of high quality T-409 stainless steel with a thickness of 2 mm. It is rigorously tested for corrosion resistance and durability to ensure long term stable operation. The aluminized silver finish is not only aesthetically pleasing, but also provides excellent performance.
5. Direct Fit & Easy Installation
Designed for seamless bolt-on installation on 2011-2015 Chevy and GMC Duramax 6.6L LML trucks, requiring no modifications or special tools.
6. Optimized for Duramax Performance
Tailored to work perfectly with your Duramax engine and turbo setup, maximizing efficiency and longevity.
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.
Why Choose DynoVox’s 5” Downpipe-Back Exhaust Pipe?
Whether you’re looking to tow heavier loads, improve fuel economy, or simply enjoy a more responsive and powerful driving experience, this exhaust upgrade is engineered to deliver. Perfect for truck enthusiasts who demand the best balance of performance, durability, and sound quality.
Transform your Chevy or GMC Duramax today with the DynoVox 5” Downpipe-Back Exhaust Pipe—unlock power, improve efficiency, and enjoy the ultimate exhaust upgrade.
| Brand | DynoVox | Tubing Size | 5-Inch |
| Thickness | 2mm | Material | T-409 stainless steel |
| Color | Silver | Finish | Aluminized |
| Package Include | Exhaust Pipe x 5 Clamp x 4 | 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