I am replacing my exhaust tube that go from the one piece manifold exhaust to the y pipe. Will I need to take the exhaust manifolds off or is it possible to replace with out. Also is it just the clamps that holds the boots or is there a sealer that I will need. So you know what part I'm referrering to the part number is 30-807458t oem, Im planning on using mallory exhaust tube 9-72804. Please let me know what you guys think.thanks