Here are the finished leak pressure test parts. A delrin(fancy plastic) mikuni carb boot plug. Either tapped for 1/4 npt or solid. The exhaust block off plates and an exhaust block off gasket. The delrin plugs fit 38mm style and 40-44mm style mikuni carb boots. The threaded plug you hook up a low pressure regulator or hand pump to pressurize the engine to 5-10 lbs. Any higher is not recommended and may blow out your seals. The kit is sold in single, twin, or triple configurations with your choice of solid or tapped plugs.