The small version S has "only" five connections for 1/2" (12.7mm) hoses and is therefore sufficient for almost all engines with a smaller displacement. As a connection example, a Type 1 can be vented on the oil filler, as well as on the valve covers and fed back to the engine via the air filter covers. The external dimensions are W 250mm x H 120mm x D 45mm with a volume of 1.3l.