PPE OEM-Length Replacement High-Flow Up-Pipes – 2017–2026 GM 6.6L Duramax L5P

The PPE OEM-Length Replacement High-Flow Up-Pipes (Part Number 116122000) are engineered for 2017–2026 Chevrolet Silverado and GMC Sierra HD trucks equipped with the 6.6L L5P Duramax diesel engine. Designed as a direct replacement for the restrictive factory up-pipes, this upgrade provides a larger exhaust flow area while retaining the original equipment mounting locations and overall pipe length. PPE reports up to a 46% larger flow area than stock, helping exhaust gases travel more efficiently toward the turbocharger.

Manufactured from heavy-duty 11-gauge 304 stainless steel, these up-pipes are built to withstand the extreme temperatures, pressure fluctuations, and engine movement associated with modern diesel applications. The internally sleeved 304 stainless steel bellows are designed to accommodate thermal expansion while supporting long-term durability. By reducing exhaust flow restriction, this system can help improve turbocharger response and manage exhaust gas temperatures under demanding towing, hauling, and work conditions.

The OEM-length configuration is designed to bolt directly to the factory exhaust manifolds and turbo connection points without requiring pipe fabrication. New stainless steel gaskets are included to support proper sealing during installation. This kit is a practical option for owners replacing worn factory up-pipes or upgrading exhaust flow while retaining the factory-style configuration and emissions equipment.

What's Included

• PPE driver-side replacement up-pipe

• PPE passenger-side replacement up-pipe

• Four stainless steel installation gaskets

Features & Benefits

• Up to 46% larger flow area than factory up-pipes, according to PPE

• Heavy-duty 11-gauge 304 stainless steel construction

• Internally sleeved 304 stainless steel bellows designed to handle heat and pressure

• OEM-length design for factory-style fitment

• Direct bolt-on installation using factory connection points

• Helps reduce exhaust flow restriction and backpressure

• Supports improved turbocharger response

• Can help manage exhaust gas temperatures under load

• Designed for demanding towing, hauling, and diesel work-truck applications

• Maintains the factory emissions-system configuration when installed as intended

Compatibility

• 2017–2026 Chevrolet Silverado 2500HD 6.6L L5P Duramax

• 2017–2026 Chevrolet Silverado 3500HD 6.6L L5P Duramax

• 2017–2026 GMC Sierra 2500HD 6.6L L5P Duramax

• 2017–2026 GMC Sierra 3500HD 6.6L L5P Duramax

The PPE High-Flow Up-Pipe Kit provides a durable exhaust-flow upgrade for L5P Duramax owners who want improved flow capacity without changing the factory-length configuration. Its stainless steel construction, internally sleeved bellows, and included gaskets make it a strong option for replacement and performance applications. Verify the truck's model year and engine before ordering to confirm fitment.

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California Proposition 65 Warning

WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm.

For more information, go to www.P65Warnings.ca.gov