Hi again Maxam,yes I can see a possible thread on the ends of the inlets,looking at the angle of these maybe the original exhaust pipes on the engine are used as part of the exhaust setup.I will not have my engine till next week,but looking at the picture on theHK site,it looks like if the exhaust stubs were rotated back from the transporting position they may line up with the Swift exhaust ring.Guess we will find out soon! Mark.