lambda sensor reduction adapter M18 / M12 stainless steel for Vespa GTS, GTV 125-300cc Euro5 49339

Female thread reducer from M18x1.5 to M12x1.25. Made of stainless steel. With this adaptor Euro5 lambda sensors with M12 thread can be mounted in older Euro3 / Euro4 exhaust systems with M18 lambda sensor connection. The reduction adaptor allows mounting of older exhaust systems on Euro5 Vespa GTS.