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

Regular price $259.00
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Product Information +

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.

If you would like to purchase the black version, please click the link

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.

Customer Reviews

Based on 13 reviews
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(13)
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A
Aaron Fernandes
No complaints!

I ordered my down pipe and it showed up on my doorstep in a week. The install went very smooth once the turbo was pulled. I advise wearing gloves when putting the heat wrap on. It’s full of what I assume is tiny fiberglass shards. It’ll wreck your hands.

Thanks for the review!!!

l
lucas dobbins
L5p downpipe

Awesome product I had no issues fitment was like a glove very nicely made very happy with it truck sounds amazing if you have an l5p just do the downpipe the sound is incredible!! Oh and the shipping was super fast shoutout to spelab!

C
Caleb Dunn

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

L
Levi Jones

Installed in a 2018 GMC Duramax Denali and Was easy to install, So far is done well.

C
Chandler Busby
Downpipe

Product is well made and great fitment. Will recommend to anyone with a L5P

L
Lenny
Good Quality

This downpipe is well made and really the only right way to do these trucks. It's not a simple job to get it in there, but well worth it when you do.

Thanks for the review and look forward to receiving pictures of your install!

J
James Simone

Great product

Hi, thanks for your comment! Looking forward to receiving pictures of your installation feedback!

J
Jacob Comstock
Nice Downpipe

Very good quality pipe and wrap. Sounds great on the truck. Arrived in a very reasonable time frame.

Thank you for your comment!!!! Looking forward to receiving your feedback pictures!