This exhaust manifold and up - pipe kit is a great fit for 2001 - 2023 GMC/Chevrolet HD vehicles with a 6.6L Duramax engine. It's designed to boost performance in multiple ways. The PPE High - Flow Manifold, made from high - quality high - sil moly cast iron, and the Up - Pipe with its internally sleeved bellows crafted from premium aircraft - grade 304 stainless steel, work together to increase flow, lower EGTs, speed up turbo spool, and maximize power. All of this is achieved while maintaining reliability. This exhaust system optimizes power and flow, enhances fuel efficiency, and improves overall dependability. The kit significantly reduces exhaust back - pressure. The up - pipes feature a free - flowing stainless steel inner liner bellows, are made from 11 - gauge .120 - inch wall stainless steel with a 2 - inch outside diameter, and have built - in bosses pre - drilled and tapped 1/8” NPT for EGT gauge sensors. There are different installation kits for 2001 - 2016 and 2017 - 2023 models. Note that the LML model needs modification on the upper control arm bushing heat shield, the up - pipe configuration may vary by model, and the 2007.5 - 2010 LMM Duramax requires the PPE coolant reroute pipe (116111810). Part Number: 116111035.

Using this exhaust manifold and up - pipe kit is easy. First, make sure to choose the right installation kit according to your vehicle's year (2001 - 2016 or 2017 - 2023). Before installation, check if your vehicle is a LML model, as it will require modification on the upper control arm bushing heat shield. If you have a 2007.5 - 2010 LMM Duramax, don't forget to get the PPE coolant reroute pipe (116111810). When installing, follow the instructions carefully to ensure proper fit and connection. As for maintenance, periodically check the exhaust system for any signs of damage or loose connections. Keep an eye on the EGT gauge if you have it installed. If you notice any abnormal readings or performance issues, it might be time to have the system inspected. Also, since the up - pipe configuration may vary depending on your model, make sure to handle it with care during installation and maintenance to avoid any unnecessary damage.