Over the weekend I removed my heat shield because it kept coming loose & coming into contact with the plastic behind the seat. I resprayed/rewrapped my header & also put some more head shield on the plastic itself. After putting everything back together, I fired it up to go through the curing process for the header spray/wrap. I noticed a knocking/popping sound that wasn't there before. The only thing I can think of is it's an exhaust leak? Are those two rings at the header flange one time use only parts? Need replaced every time you take the header off? If it is an exhaust leak will this cause any issues? We're going riding this weekend.