RE: Picco 60
Actually, the rear exhaust Piccos are a pain to find headers for.
I had a long discussion with Dave over at Macs about trying to find a header for my rear exhaust Picco. He told me that the issue with Picco was they were always changing the outer diameter of the exhaust port. Every year it was different so he didn't bother making headers for the round, knub type rear exhaust. Side exhausts are a different story...
Someone mentioned a Rossi header would work....I have no idea. I do know the OD for the exhaust on the Picco is .901 inches. About 23 MM. I used a mic for this measure.
I would also love to have a header for it....MACs said they'd make me one...but it would cost me.