Hi there, I'm reasonably new to the boating scene. Had a 1990 bayliner that I just sold, and purchased this 1997 Bluewater mirage with the 5.7l volvo penta/sx cobra out drive. The boat is pretty darn clean and in good shape..other than some crispy looking exhaust. The manifolds/risers look good. But just past them where the rubber couplers begin, and the y-pipe are looking like they got pretty hot at one point. I've got a small drip on the port side upper coupler. The boat doesnt overheat on the muffs, the oil is clean, and the plugs are all equally rich looking. I've included some pictures. Obviously I'm looking at replacing the couplers at least. What else would you guys recommend looking into? The motor has 425 hrs and has only been in fresh water. I'm going to replace the impeller as well. Thank you