Upper Down Pipe Flange Gasket

Features:

• Fits 2017-2026 Silverado and Sierra HD
• Designed for 6.6L Duramax engines
• Constructed from 301 stainless steel
• Handles high exhaust temperatures
• Ensures secure exhaust flange seal
• Helps prevent exhaust leaks
• Compatible with OEM down pipes
• Works with PPE down pipe 117000800
• Direct-fit replacement gasket design
• Built for long-lasting durability

Seal In Performance And Keep Exhaust Flow Right Where It Belongs

When you are working on your Duramax, even the smallest sealing components can make a big difference, and this PPE upper down pipe flange gasket is a perfect example. Built for 2017-2026 Silverado and Sierra 2500HD and 3500HD trucks, it helps ensure your exhaust system stays sealed tight under real world driving conditions. A proper seal at the flange keeps exhaust flow consistent, which is especially important when your truck is under load or running higher boost levels. Additionally, this gasket helps prevent annoying exhaust leaks that can lead to noise, reduced efficiency, or even long term wear on surrounding components. Whether you are replacing a worn gasket or installing a new down pipe, this is one of those parts you do not want to overlook. It fits both OEM and PPE down pipes, so you have flexibility depending on your setup. If you are already in there working on your exhaust, this is a simple upgrade that helps everything perform the way it should.

Engineered Stainless Steel Construction For High Heat Duramax Applications

This PPE 117000363 gasket is constructed from 301 stainless steel, giving it the strength and heat resistance needed for demanding diesel exhaust environments. It is specifically designed for the upper down pipe flange connection on 6.6L Duramax engines, where temperatures and pressure can quickly break down lower quality materials. Additionally, stainless steel construction helps maintain a consistent seal over time, even through repeated heat cycles and heavy use. The gasket is precision cut for proper fitment, ensuring it aligns correctly with both factory and PPE down pipes, including PPE part number 117000800. This tight fit helps prevent leaks while maintaining proper exhaust flow and system efficiency. What’s more, using the correct gasket during installation helps protect surrounding components from excess heat and escaping gases. For anyone maintaining or upgrading their exhaust system, this gasket delivers the durability and reliability your setup demands.

Fitment: 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026 GM Sierra/Silverado 2500HD/3500HD 6.6L Duramax

Notes:

• Fits 2017-2026 GM 6.6L Duramax only
• Designed for 2500HD and 3500HD models
• Used at upper down pipe flange
• Compatible with OEM down pipe systems
• Compatible with PPE down pipe 117000800
• Constructed from 301 stainless steel
• Designed for high heat exhaust environments
• Ensure proper sealing during installation
• Recommended replacement during exhaust service
• Verify fitment before installation