This is an accurate reproduction
of the original 1915 / early 1916 style manifold. An original manifold
was used to make the casting pattern and all machining was done by us
on CNC equipment. The diameter of the bushing area is machined and sized
to high accuracy. It is sized to fit the aftermarket brass packing washers
currently available. The manifold is supplied un-plated so you can match
the finish to the other brite work on your bike. Make sure to let your
plater know to be careful of the bushing area during polishing. We would
suggest protecting it with tape during polishing so the finely machined
sealing surface isn't marred.