i don't know about the quality but they are often used in multi million dollars classic Ferraris because it was the standard equipment on them
https://cimg0.ibsrv.net/gimg/www.ch..._d92e2d78a3e8b62e90b5f24909e24215922ae913.jpg
https://rmsothebys-cache.azureedge.net/e/c/e/f/1/6/ecef1656dd9b38e3401c8541b630e9b02604881a.jpg
I assure you they have 3 small round air filters with some having one large rectangular filter. You could have have them in 3x Weber or 6x webber carb as well depending on configuration. The airbox was different for each.Pas de filtre à air non plus.
Ces machines là, c'est pas fait pour rouler 100 000 km et pas avoir de trouble. Le filtre à huile est là pour ramasser les morceaux de métal en suspension suite à l'assemblage et au rodage. Un plus petit screen sur le oil pickup aurait fait la job