420cc Pr-edator Engine - 1 Threaded Exhaust Flange | Ubuy

You also have to get longer screws. Note: THIS EXHASUST ADAPTOR DOES NOT WORK ON DUR-OM-AX ENGINE 16HP OR 18 HP Flange Center Hollow To Hollow Approximately 2 inch (Size see photos for details) Installation: Flange is CNC cut from heavy 1/4 steel plate to prevent warping,Strict quality control standards to Build and test. Designed as a direct replacement for your 1 NPT Flange. Made to factory specifications for a hassle-free installation, Professional installation is highly recommended Propose: Leave the spark arrestor internal funnel and face plate screen in place before applying this exhaust gasket and adapter. The screws are M5-0.8 x 16 or M5-0.8 x 20