Looking to take your LLY Duramax truck to the next level? Look no further than the PPE 116111400 Manifold Upgrade & Up Pipes. This kit includes everything you need to upgrade your manifold and up pipes, made from aircraft-grade 304 stainless steel for increased flow and lower exhaust gas temperatures. This will accelerate turbo spool-up, increasing power and fuel economy while maintaining reliability. The kit includes two PPE Manifolds, two PPE Up-Pipes, a PPE Down Pipe Support Bracket, PPE 304 Stainless Steel Manifold Gaskets and Up-Pipe Gaskets. It also features built in bosses, pre-drilled and tapped 1/8 NPT for EGT Gauge.