ktm 303Series: KTM Model: 2KTM303 2KTM304 3 HP 3450 RPM Discharge: 2 DISCHARGE 2 vertical for hose coupling. Cast iron ASTM A-48 classOhlins KT 303 canister position on a DUKE 390. ... DynoJet quickshifter and PCV, Gray Area KTM airbox and injector, open lid, inverted K&N filter, Spark hh mount exhaust,