Hi, seems that I have purchased an exhaust system from a third party that has a part missing. This is a system for a Polaris Sportsman 500 1998 model. The system is new with tags attached. I installed it only to find out that the head pipe connection to the head seems to be needing a gasket that I didn't find in my box. Am I missing something? The springs were also very loose indicating that there needs to be a donut type gasket in the connection. I fired it up anyway and all I could hear was the leak from the head pipe. Any info would be helpful.