L5P Duramax High-Flow Exhaust Manifolds & Up-Pipes

Upgrade your L5P's exhaust flow with our high-flow manifold and up-pipe kit!

Designed for the 2017+ 6.6L L5P Duramax, this kit combines high-flow exhaust manifolds with stainless steel up-pipes to improve exhaust flow and support increased performance.

Whether you're upgrading your factory turbo setup or building a higher-horsepower L5P, this kit is a great addition to your build.

Features & Benefits

• High-Flow Exhaust Manifolds – Designed to improve exhaust flow over restrictive factory components.

• Stainless Steel Up-Pipes – Durable stainless construction with tig welded flanges.

• Improved Exhaust Flow – Helps reduce exhaust restriction and supports turbocharger performance.

• Performance-Oriented Design – Suitable for stock-style and upgraded turbocharger applications

Kit Includes

• (1) Driver-Side High-Flow Exhaust Manifold

• (1) Passenger-Side High-Flow Exhaust Manifold

• (1) Driver-Side Stainless Steel Up-Pipe

• (1) Passenger-Side Stainless Steel Up-Pipe

• Gaskets and Hardware

Vehicle Fitment

2017-2023 Chevrolet Silverado & GMC Sierra 2500HD/3500HD — 6.6L L5P Duramax

Please confirm exact model-year compatibility before ordering.

Why Choose Proven Performance?

At Proven Performance, we understand that every part of a performance build matters. From daily-driven trucks to high-horsepower applications, we're committed to offering quality components that help you get the most out of your Duramax.