SKU: 80413349172

6.6L Duramax L5P CAT & DPF Delete Pipe | 2017–2025 GMC/Chevy

Sale price$173.25 Regular price$192.50
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Description

6.6L Duramax L5P CAT & DPF Delete Pipe | 2017–2025 GMC/ChevyOverview This GM Duramax L5P Cat & DPF Delete Pipe is designed to replace the restrictive factory emissions section on 20172025 6. 6L Duramax pickup trucks. By removing the catalytic converter and DPF assembly, this Duramax L5P delete pipe allows exhaust gases to exit the turbocharger with significantly less restriction. The result is improved exhaust flow, reduced backpressure, and a cleaner path for performance oriented tuning applications.

Overview

This GM Duramax L5P Cat & DPF Delete Pipe is designed to replace the restrictive factory emissions section on 2017–2025 6.6L Duramax pickup trucks. By removing the catalytic converter and DPF assembly, this Duramax L5P delete pipe allows exhaust gases to exit the turbocharger with significantly less restriction. The result is improved exhaust flow, reduced backpressure, and a cleaner path for performance-oriented tuning applications.


Compatibility

  • Years: 2017–2025
  • Makes: Chevrolet, GMC
  • Models: Silverado 2500HD, Silverado 3500HD, Sierra 2500HD, Sierra 3500HD
  • Engine: 6.6L Duramax L5P Diesel
  • Important: Fits pickup trucks only. Does not fit 3500/4500/5500 Cab & Chassis models. Cab & Chassis trucks use a different exhaust configuration.

Technical Specifications

Specification Detail
Pipe Diameter 4" Mandrel-Bent Exhaust Tubing
Material Options T-304 Stainless Steel or T-409 Stainless Steel
Construction Mandrel-bent tubing for consistent internal diameter and exhaust flow
Connection Type Direct-fit replacement for factory catalytic converter and DPF section
Mounting Uses factory hanger locations

Key Features & Build Details

  • 4" Mandrel-Bent Exhaust Tubing – Maintains a consistent internal diameter throughout the pipe to reduce turbulence and improve overall exhaust gas evacuation from the turbo.
  • Dual Stainless Steel Material Options – Available in T-304 stainless steel for maximum corrosion resistance or T-409 stainless steel for a more economical option while still maintaining durability.
  • Direct Replacement Design – Built to replace the factory catalytic converter and DPF section, maintaining proper routing under the truck while using OEM hanger locations.
  • Full Emissions Section Removal – Eliminates the restrictive catalytic converter and diesel particulate filter assembly commonly known to create exhaust backpressure on tuned trucks.

Performance Benefits

  • Reduced Exhaust Backpressure – Removing the factory DPF and catalytic converter significantly improves exhaust flow, helping the turbo operate more efficiently.
  • Improved Turbo Response – Less restriction after the turbo allows exhaust gases to exit faster, which can help improve turbo spool characteristics.
  • Lower Exhaust Gas Temperatures – Improved exhaust flow can help stabilize EGT levels during heavy load or towing situations when paired with proper tuning.
  • Supports Performance Tuning – Provides the necessary exhaust configuration required for off-road race tuning on L5P Duramax trucks.

Installation Notes

Direct-fit exhaust section designed to replace the factory catalytic converter and DPF assembly. Installs using standard exhaust tools and factory mounting locations. Professional installation is recommended, and ECM tuning is required to prevent emissions-related fault codes after installation.


Frequently Asked Questions

Q: Will this fit a 2019 or 2024 L5P Duramax truck?
A: Yes. This pipe fits 2017–2025 Chevrolet Silverado and GMC Sierra 2500HD and 3500HD pickup trucks equipped with the 6.6L L5P Duramax engine.

Q: Does this fit Cab & Chassis trucks like the 3500HD, 4500 or 5500?
A: No. Cab & Chassis trucks use a different exhaust configuration. This pipe is designed specifically for pickup models only.

Q: What is the difference between T-304 and T-409 stainless steel?
A: T-304 stainless offers higher corrosion resistance and is preferred for trucks operating in wet or salted environments. T-409 stainless is more cost-effective while still providing solid durability for normal use.

Q: Is tuning required after installing this pipe?
A: Yes. Since this pipe removes the factory emissions components, proper ECU tuning is required to prevent check engine lights and ensure correct engine operation.

Q: Does the kit include hardware?
A: The pipe is designed to integrate with factory mounting points and exhaust hangers. Installation typically reuses factory clamps and mounting locations depending on the existing exhaust configuration.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 80413349172

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Elizabeth Darcy
Battle Creek, US
★★★★★ 4
Good Value, Nice Fabric, But Could Have Better Finishing.
I'm 5'3 and 125# and the size small was a near perfect fit, although I hope I don't gain any weight. These have an elastic waistband in addition to the drawstring and the elastic is pretty strong, so if you are on the border between sizes, I'd recommend sizing up. I was a little annoyed with how these arrived - they come in a box, but inside the box the set I got was balled up in and in a plastic bag then shoved into the box. I suspect I may have gotten a set that was a return, because I can't imagine them being packaged that way out of the factory. Since these are primarily linen, the result of this type of packing is that they were so wrinkled I nearly sent them straight back! I tried them on anyway and since they fit me well, I decided to keep them, but I hope that most of the wrinkles come out in the wash, otherwise I'll have to haul out the iron which I haven't had to do in ages. I don't wear shorts all that often, but since these were a linen blend and every summer seems to be getting hotter, I thought these would be comfortable to wear on those 90+ degree days. Linen is comfortable and breathable and cotton does a good job of wicking away moisture, so it's the perfect blend for the hottest and stickiest days of summer. They aren't too short, which is a plus. I did need to snip a lot of loose strings off of these, so these could have a nicer finish, but for less than $20/pair, I'm not too fussed about it. I think these will wash up well and will look a lot better once ironed, but hopefully, I'll only have to iron them once to get them into the right shape. If they need to be ironed every time they're washed, they'll probably be relegated to the back of my closet where my least favorite clothes go to die, because who has time to iron??!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 26, 2025
R
Verified Purchase
raevarg
Waukegan, US
★★★★★ 5
Nice
Color: Black, White, Size: Large
Nice weight , nice fit but...have to be ironed
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Reviewed in the United States on July 1, 2025
A
Verified Purchase
Amazon Customer
Boise, US
★★★★★ 2
Not linen
These aren’t linen, these are microfiber shorts. Fabric feels very cheap.
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Reviewed in the United States on July 12, 2025
L
Lehc00
Bozeman, US
★★★★★ 5
True To Size
These shorts fit true to size and are so comfortable. They have a drawstring waist, so you can adjust them for the best fit and wide legs. They are 55% linen and 45% cotton so they keep you feeling cool. The classic colors go with nearly any other colors or designs, making them stretch your wardrobe potential and saving you money. They were extremely wrinkled upon arrival, so I used my fabric steamer, and within 5 min they looked perfect. I love these shorts and wear them all the time!
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Reviewed in the United States on May 27, 2025
S
Sydney J
Carnegie, US
★★★★★ 4
Cute 2-pack pair of shorts
Color: Black, White, Size: Medium, Color: Black, White, Size: Medium
Cute shorts that have pockets and fit true to size. I love that they come in a pack of two as well. The black ones are my favorite and I feel like the fabric is a little softer on the black pair. The white ones are a little thinner than I would like. I was wearing an olive green colored underwear underneath them in the pictures in my review and though you can’t see them much, I do feel like they were slightly visible. The white pair also had a lot of loose strings on them which made me think the quality might not be as good as with the black pair. They washed easily and I hung them up to dry them because they smelled kind of funny when they arrived.
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Reviewed in the United States on June 7, 2025

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