2017–2019 Chevy/GMC 6.6L L5P DPF Delete Pipe
Choose the exhaust configuration that matches how much of the factory DPF-related exhaust system needs to be replaced. These 4-inch and 5-inch pipe options are listed for specified 2017–2019 Chevrolet Silverado and GMC Sierra 2500HD/3500HD crew-cab trucks with the 6.6L L5P Duramax diesel engine.
This product is a DPF race-pipe or downpipe-back exhaust configuration, depending on the selected SKU. It is not an EGR delete kit, CCV reroute kit, or DEF-only delete kit. Tuning, software, and electronic modules are not included. Check the engine code, flange, factory exhaust layout, selected SKU, and vehicle-use requirements before ordering.
Fitment
| Years | Make | Model | Engine | Body Configuration |
|---|---|---|---|---|
| 2017–2019 | Chevrolet | Silverado 2500HD / 3500HD | 6.6L L5P Duramax diesel | Crew cab, short bed or long bed |
| 2017–2019 | GMC | Sierra 2500HD / 3500HD | 6.6L L5P Duramax diesel | Crew cab, short bed or long bed |
- Engine code: 6.6L L5P Duramax diesel.
- FLES08120 flange: Four-bolt flange applications only.
- Not listed: 3500/4500/5500 Cab & Chassis commercial-style trucks.
- 2020–2022 applications: These model years are not included in the listed fitment.
- Existing modifications: Aftermarket downpipes, tailpipes, dual exhausts, altered hangers, suspension changes, hitches, or oversized spare tires can affect alignment and clearance.
Specifications
| Product Type | DPF race pipe or downpipe-back exhaust, depending on selected configuration |
|---|---|
| Material | T-409 stainless steel |
| Wall Thickness | 2 mm |
| Pipe Sizes | 4 inch or 5 inch, according to selected configuration |
| Engine | 6.6L L5P Duramax diesel |
| Tuning Included | No |
T-409 stainless steel is magnetic, so a magnet can adhere to the pipe material.
Available Configurations
| SKU | Configuration | Pipe Size |
|---|---|---|
| FLES08120 | DPF Race | 4 inch |
| FLES08067 | Downpipe-Back | 4 inch |
| FLES08071 | Downpipe-Back with Muffler | 5 inch |
Components differ between the DPF Race and downpipe-back configurations. Select the required SKU before ordering and use the instructions that match that configuration.
Key Features
- Listed L5P applications: Covers the specified 2017–2019 Silverado and Sierra 2500HD/3500HD crew-cab applications with the 6.6L L5P diesel.
- Three exhaust configurations: Choose a 4-inch DPF Race, 4-inch Downpipe-Back, or 5-inch Downpipe-Back with Muffler.
- T-409 stainless steel: Suitable for the heat and operating conditions of an exhaust system.
- Welded hanger locations: The FLES08120 pipe sections use welded hangers at the applicable factory rubber-mount locations.
- Configuration-specific installation: Pipe routing, connection points, cutting, and reused factory parts depend on the selected exhaust configuration and truck setup.
What This DPF Delete Pipe Changes
The DPF Race configuration replaces the applicable factory DPF-related exhaust section with a multi-piece pipe assembly. Downpipe-back configurations replace a longer portion of the exhaust system according to the selected SKU.
This product changes the exhaust aftertreatment hardware. It does not remove or block the engine's EGR valve and cooler, and it does not reroute the crankcase ventilation system. EGR delete, CCV reroute, and DEF-only components are not included.
What Is Included
Package contents vary by selected exhaust configuration.
4" DPF Race — SKU FLES08120
- Pipe section 11711
- Pipe section 11213
- Connection section 40220
This configuration uses welded exhaust hangers at the applicable factory mounting locations. Installation reuses applicable factory fasteners, rubber exhaust mounts, and the factory tailpipe connection.
Downpipe-Back Configurations
The 4-inch Downpipe-Back and 5-inch Downpipe-Back with Muffler use different components from the FLES08120 DPF Race configuration. Select the required SKU before ordering.
Additional Parts and Services
- Tuning, programming, software, and electronic modules are not included.
- Applicable factory fasteners, rubber mounts, and exhaust connections are reused during FLES08120 installation.
- Cutting or exhaust adjustment can be required for some cab, bed, wheelbase, suspension, or existing exhaust configurations.
- Professional installation is recommended.
Tune and Factory-System Requirements
A compatible vehicle calibration is required when the applicable DPF-related hardware and sensors are removed from the factory system. The exhaust pipes do not include a tuner, software license, calibration, or electronic module.
Vehicle operation depends on the selected exhaust configuration, calibration, sensor handling, installation quality, and the condition of the truck. A calibration does not guarantee that every warning, diagnostic code, or drivability issue will be prevented.
Possible CEL and System Effects
Removing factory DPF-related hardware without the required vehicle configuration can result in a check engine light, diagnostic trouble codes, regeneration-related faults, warning messages, or reduced-power operation. Installation and calibration must be compatible with the truck's factory control system and intended use.
Technician reminder: Identify the affected exhaust components, sensors, lines, hangers, and connection points before removing the factory system. DPF, DOC, SCR, DEF, catalyst, and EGR components perform different functions and should not be treated as interchangeable parts.
Installation Notes
- Allow the exhaust system to cool completely before beginning work.
- Support the vehicle with properly rated lifting and support equipment.
- Check clearance around the OEM hitch, spare tire, wheels, suspension, transmission crossmember, and surrounding components.
- Cutting can be required during factory exhaust removal or for certain wheelbase and exhaust configurations.
- Position the pipe sections, hangers, and clamps before final tightening.
- Check all connections and surrounding clearance after installation and after the first heat cycles.
View the FLES08120 DPF Delete Pipe Installation Instructions
Who This Product Is For
- Owners of a listed 2017–2019 Silverado or Sierra 2500HD/3500HD crew cab with the 6.6L L5P Duramax diesel.
- Owners whose flange and factory exhaust layout match the selected configuration.
- Buyers who understand which section of the exhaust system their selected SKU replaces.
- Buyers prepared for the required mechanical work, vehicle configuration, and applicable use restrictions.
Who Should Not Buy This Product
- Owners of model years or engine codes outside the listed fitment.
- Owners of 3500/4500/5500 Cab & Chassis commercial-style trucks.
- Buyers who need to retain the complete factory emissions-control system.
- Buyers expecting tuning, software, an EGR delete kit, a CCV reroute kit, or DEF-only components in the package.
- Buyers requiring a guarantee of no CEL, no diagnostic trouble codes, emissions-test approval, registration eligibility, warranty retention, insurance acceptance, or road legality.
Emissions and Road-Use Notice
This exhaust product is designed for race-use applications and changes factory emissions-related hardware. A race-use designation does not override federal, state, or local requirements.
Removing or rendering factory emissions controls inoperative can be prohibited. Check all laws, registration requirements, warranty terms, and insurance conditions that apply to the vehicle and its intended use before purchase or installation.
Shipping & Returns
Free U.S. Shipping: Orders are typically processed within 1–2 business days and delivered within 5–10 business days. Additional charges can apply to remote areas. See the Shipping Policy for details.
30-Day Returns: Unopened and unused items in their original packaging can be returned within 30 days of receipt. Return shipping is covered for approved quality issues. See the Refund Policy for return conditions.
Worry-Free Delivery: Optional protection against eligible loss, theft, delay, or transit damage is available at checkout. See the Worry-Free Delivery Protection terms.
Related Parts
Browse the DPF & Cat Delete Pipe collection for other listed engines and model years. A separate L5P EGR Delete Kit is available for the engine's EGR system and is not included with this exhaust product.
2017–2019 L5P Duramax DPF Delete Pipe FAQs
Q1: What factory system does this product change?
A1: It replaces applicable DPF-related exhaust sections. The length of exhaust replaced depends on whether you select the DPF Race or downpipe-back configuration.
Q2: Is this an EGR, CCV, or DEF delete kit?
A2: No. This is a DPF race-pipe or downpipe-back exhaust product. EGR, CCV, and DEF-only components are not included.
Q3: Which engine code does it fit?
A3: It is listed for the 6.6L L5P Duramax diesel in the specified 2017–2019 Chevrolet and GMC applications.
Q4: Does it fit 2020, 2021, or 2022 Duramax trucks?
A4: Those model years are not included in the listed fitment.
Q5: Does it fit Cab & Chassis trucks?
A5: No. The listed fitment excludes 3500/4500/5500 Cab & Chassis commercial-style trucks.
Q6: What is included with FLES08120?
A6: FLES08120 includes pipe section 11711, pipe section 11213, and connection section 40220. Applicable factory fasteners, rubber mounts, and the factory tailpipe connection are reused.
Q7: Are the contents the same for every configuration?
A7: No. Components differ between the 4-inch DPF Race, 4-inch Downpipe-Back, and 5-inch Downpipe-Back with Muffler configurations.
Q8: Does it include tuning or programming?
A8: No. A tuner, software license, calibration, and electronic module are not included.
Q9: Is a vehicle calibration required?
A9: A compatible vehicle calibration is required when the applicable DPF-related hardware and sensors are removed.
Q10: Can installation cause a check engine light or reduced-power operation?
A10: Yes. An incompatible vehicle configuration can result in a CEL, diagnostic trouble codes, regeneration faults, warning messages, or reduced-power operation.
Q11: Will existing modifications affect installation?
A11: They can. Aftermarket exhaust parts, altered hangers, suspension changes, hitches, oversized spare tires, or previous fabrication can affect alignment and clearance.
Q12: Is cutting required?
A12: Cutting can be required during factory exhaust removal or for some cab, bed, wheelbase, and existing exhaust configurations.
Q13: Does this product change the cooling system?
A13: No coolant-system components are included. This is an exhaust-system product, not an EGR-cooler delete kit.
Q14: Is professional installation recommended?
A14: Yes. Installation involves vehicle lifting, heavy exhaust components, cutting in some applications, alignment, clearance checks, and emissions-related hardware.
Q15: Is the modification completely reversible?
A15: Complete reversibility is not guaranteed. Returning the truck to its factory configuration requires serviceable original parts and can require replacement of sections that were cut or modified.
Q16: Can this affect emissions testing, registration, warranty, or insurance?
A16: Yes. Changing factory emissions-related hardware can affect each of these. Check the requirements and terms that apply to the vehicle and its intended use.