Jeep OM642 exhaust Y Pipe collector port and polish. This is an service to port and polish your exhaust y pipe. The basic service is to do a port match on the inlets and outlets to match the gaskets. There is about and 0.125" lip around the ports so exhaust is getting blocked and slowing down the flow. The exhaust y pipes will be cleaned inside and out and port matched. We also offer a full port and polish that will go deeper into the collector and allow full flow from the exhaust manifolds to the turbo turbine housing. We can also sandblast and paint the y pipes with a baked on high temp paint for an additional charge. There is a core charge of $125 if you do not want to send in your manifold before. This is an exchange service as you will need to provide a core. We can send these out ahead of time, however you will need to pay the core charge and it will be refunded once your core has been received in good shape.