Pacific Performance Engineering
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PPE High-Flow Down Pipe for Chevy/GMC (2017-25) 6.6L Duramax LML (304 Stainless Steel)

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117000800
Upgrade your L5P Duramax with the PPE Free-Flow Downpipe and eliminate the rusted, restrictive factory design. The PPE Down Pipe highlights unrestricted 3.5-inch diameter flow path, fully machined and TIG welded upper flange with factory-style V-band, and 304 stainless steel piping. It ensures smooth transitions for unobstructed exhaust flow.

To further enhance performance, it comes with a woven titanium sleeve that effectively insulates heat, protecting the engine bay.
Pricing: $219.99

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Description

Features
•304 Stainless steel construction for durability and corrosion resistance
•Lower EGT, better turbo efficiency and response
•TIG welded flanges for leak-free, robust connections
•Smooth transitions and free-flowing design
•Woven titanium heat sleeve
•Compatible with factory or PPE Up-Pipes
•Retains factory sensor port (M14-1.5)

OEM P/N REFERENCE: GM 12671086

Fitment:
2025 GMC Sierra 3500HD 6.6L V8 Turbo Diesel (Duramax)
2025 GMC Sierra 2500HD 6.6L V8 Turbo Diesel (Duramax)
2025 Chevrolet Silverado 3500HD 6.6L V8 Turbo Diesel (Duramax)
2025 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel (Duramax)
2024 GMC Sierra 3500HD 6.6L V8 Turbo Diesel (Duramax)
2024 GMC Sierra 2500HD 6.6L V8 Turbo Diesel (Duramax)
2024 Chevrolet Silverado 3500HD 6.6L V8 Turbo Diesel (Duramax)
2024 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel (Duramax)
2023 GMC Sierra 3500HD 6.6L V8 Turbo Diesel (Duramax)
2023 GMC Sierra 2500HD 6.6L V8 Turbo Diesel (Duramax)
2023 Chevrolet Silverado 3500HD 6.6L V8 Turbo Diesel (Duramax)
2023 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel (Duramax)
2022 GMC Sierra 3500HD 6.6L V8 Turbo Diesel (Duramax)
2022 GMC Sierra 2500HD 6.6L V8 Turbo Diesel (Duramax)
2022 Chevrolet Silverado 3500HD 6.6L V8 Turbo Diesel (Duramax)
2022 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel (Duramax)
2021 GMC Sierra 3500HD 6.6L V8 Turbo Diesel (Duramax)
2021 GMC Sierra 2500HD 6.6L V8 Turbo Diesel (Duramax)
2021 Chevrolet Silverado 3500HD 6.6L V8 Turbo Diesel (Duramax)
2021 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel (Duramax)
2020 GMC Sierra 3500HD 6.6L V8 Turbo Diesel (Duramax)
2020 GMC Sierra 2500HD 6.6L V8 Turbo Diesel (Duramax)
2020 Chevrolet Silverado 3500HD 6.6L V8 Turbo Diesel (Duramax)
2020 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel (Duramax)
2019 GMC Sierra 3500HD 6.6L V8 Turbo Diesel (Duramax)
2019 GMC Sierra 2500HD 6.6L V8 Turbo Diesel (Duramax)
2019 Chevrolet Silverado 3500HD 6.6L V8 Turbo Diesel (Duramax)
2019 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel (Duramax)
2018 GMC Sierra 3500HD 6.6L V8 Turbo Diesel (Duramax)
2018 GMC Sierra 2500HD 6.6L V8 Turbo Diesel (Duramax)
2018 Chevrolet Silverado 3500HD 6.6L V8 Turbo Diesel (Duramax)
2018 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel (Duramax)
2017 GMC Sierra 3500HD 6.6L V8 Turbo Diesel (Duramax)
2017 GMC Sierra 2500HD 6.6L V8 Turbo Diesel (Duramax)
2017 Chevrolet Silverado 3500HD 6.6L V8 Turbo Diesel (Duramax)
2017 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel (Duramax)

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Shipping Information

  • Item Requires Shipping
  • 7.1 lbs.
  • W7.7500” x H5.7500” x L18.7500”
  • Free Shipping

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