Exhaust Up-Pipe/Downpipe/EGR Delete Kit for 2017-2023 L5P 6.6L Duramax Sierra/Silverado 2500 3500 HD

FlasharkSKU: FLES08191-ES08074
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Product 1: Exhaust Up-Pipe
Product 2: Downpipe Exhaust
Sale price$425.00

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Exhaust Up-Pipe/Downpipe for 2017-2023 L5P 6.6L Duramax Sierra/Silverado 2500HD 3500HD


  • 2017-2022 L5P 6.6L Duramax Diesel GMC Sierra 2500/3500 HD
  • 2017-2022 L5P 6.6L Duramax Diesel Chevrolet Silverado 2500/3500 HD

In this package, you will receive the following items:

Up-pipes and downpipes – What do they do?

Up-pipe is a piping that connects the exhaust manifold with the turbo. Exhaust gases enter the turbo from the up-pipe. Down-pipe is a piping that connects the turbo with the rest of the exhaust pipe. Exhaust gases leave the turbo from the down-pipe.  

What does a downpipe do?
The downpipe on your turbocharged vehicle is directing the exhaust gases out of the turbine housing into the exhaust system. An aftermarket downpipe will typically be larger in diameter and either use a high-flowing catalytic converter or remove the catalytic converter altogether. By removing the factory downpipe and replacing it with a high-flowing unit you are allowing the turbo to move gases away from the turbine which creates more power. Since the factory restrictions are now gone you can increase the boost on the vehicle as the factory downpipe is a choking point for performance. 

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