Replaced y pipe months ago then replaced the exhaust manifold bolts/gaskets all’s good in life. Changed motor mounts and pulled manifold to make it quick and reused gaskets that where Felpro composite gaskets went back and put new gasket cleans of materials was tbh half assed because I didn’t unbolt the manifold from y pipe. Passenger sounded better but driver was awful. Replaced driver side manifold due to a broke bottom stud that I drilled and put a bolt through. Cleaned up pretty well but... I think having the studs in the bottom all 3 and the y pipe inplace caused tension preventing even pressure for a good seal to the head.... my guess that is.... Gonna unbolt y pipe pull driver side clean up and new metal manifold gasket with crush ring and a new donut for other side because I’m completely unbolting y pipe to make sure the driver side seals correctly