it is a one throat carburator. it is a solex /brosol type of carburator. it was originally used in a 4cc GM "opala" in the early 70s. But Puma decided to improve the carbration and made a kit with them. so there are 2 carbutators 40 mm soex/brosol and and two short admition with a 1800cc engine kit eith a 286o crane. It was so dificult to adapt that I decided to give up the idea of buying a pair of those. I bought a pair of 32/34 solex carburators...
hanks for your attention.
