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  • 3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB
3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB
3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB
3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB
3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB
3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB
3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB
3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB
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Load image into Gallery viewer, 3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB
Load image into Gallery viewer, 3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB
Load image into Gallery viewer, 3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB
Load image into Gallery viewer, 3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB
Load image into Gallery viewer, 3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB
Load image into Gallery viewer, 3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB

3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB

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Downpipe Exhaust
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3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel

3.5'' Downpipe Exhaust For 2017-2023 L5P 6.6L Duramax Diesel | SPELAB

This 3.5" turbocharger downpipe will increase exhaust flow, improving performance.  

Specifications:

Brand Name: SPELAB
Application:  Downpipe Exhaust
Material: Stainless Steel
Surface: Mirror Polish
Type: 3.5 Inch Downpipe for 2017,2018,2019,2020,2021,2022,2023 Chevrolet Silverado & GMC Sierra 2500 & 3500HD L5P 6.6 Duramax Diesel 

Fitment:

2017,2018,2019,2020,2021,2022,2023 Chevrolet Silverado & GMC Sierra 2500 & 3500HD 6.6L Duramax pickup trucks. Will not fit Cab & Chassis trucks.

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 uses 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 more efficiently 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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