This EGR upgrade package is tailor - made for 2020 - 2023 GMC L5P models with a 6.6L Duramax engine. Custom tuning is required. Our EGR upgrade is designed for those who expect top - notch performance from their L5P Duramax. It's a comprehensive solution that helps you fix your OEM EGR before issues arise and costs pile up. Part Number: L5P - EGR - A045. Features include pre - built heater hose assemblies with quick - connect fittings, stainless steel Y - bridge and exhaust manifold block - off plates, a mil - spec anodized aluminum thermostat bridge billet block - off with an O - ring, a 9th injector plug, coolant line plugs and caps, and all necessary gaskets and hardware. It's proudly made in North America. We also recommend adding the 3.5' L5P Downpipe. It replaces your crushed factory downpipe and DOC, connects to your OE turbo outlet flange, and mates with your OEM or aftermarket race exhaust system. Made of high - polish stainless steel, it comes with a high - quality heat wrap kit. Click here to view installation instructions.

Using this EGR solution package is straightforward. First, make sure you have the custom tuning done as required. Then, you can start the installation process. Refer to the installation instructions by clicking the link provided. When installing, pay attention to properly connecting all the components, like the pre - built heater hose assemblies with quick - connect fittings. For maintenance, keep an eye on the gaskets and hardware. If you notice any signs of wear or leakage, replace them promptly. Also, the recommended 3.5' L5P Downpipe, made of high - polish stainless steel, should be checked for any damage regularly. And don't forget to maintain the heat wrap kit that comes with it. If you have any questions during the use, feel free to seek professional help.