We raised the bar on the competition for single throat high performance dual carburetor kits. We have taken the great performing Air Cooled VW 40 Brosol / Solex and enlarged it to a true high flowing 40mm Carburetor. If your existing dual Solexs feel like they could use some more "punch" or you like the idea of smooth starting, then upgrade now to a new version of a Solex / Brosol 40mm Dual Carburetor kit. Fits all Type 1 & 2 VW dual port upright 1600cc based engines.