13XX VALVE STEM fits 1377, 1322 & MAXIMUS
This valve-stem is original to classic 1377, 1322 and 760 models as well as more recent 2289G Backpacker, Maximus, M4-177 and many others. It's the same stem we use for our custom Magnum Valves for 13XX and low-pressure versions of our Magnum Valve for Discovery and 22XX PCP conversions. It works well up to around 2000 PSI with 2200 PSI really pushing the limit of what it can handle. It seals better at low pressures than the Marauder stem which works well in the 2000-3500 PSI range.