Used - Liked NEW OEM Y-Pipe Works with many Mercruiser Engines! Part Number - 807130a4 Casting Number - 807130-c or 861229c Replaces the following part numbers: 815786 and 8M0115149 This exhaust has minimum wear and tear and was used in saltwater conditions. There is nothing wrong with them and has several more hours of use left on them. We had recently rehauled our boat with brand new engines and this part was supplied with our new purchase. Therefore, we no longer need them!