Replying to post by autoinsider:
Can you describe the noise a bit more? Where does it sound like its coming from? Does it go away when changing gear? Is it noisy at idle speed?
Just some sort of a continuous knocking loud noise, as far as I observe the noise can be heard more on the top part of the engine as well as in the rear muffler, continued to be noisy underway or in rpm mode, even shifting gear