Complex sentence: A a supercharger or a turbocharger is used to pump air into the cylinder through ports in the side of the cylinder the exhaust exits through the top of the cylinder head via conventional four stroke style poppet valves.
Split into simpler sentences: A a supercharger or a turbocharger is used to pump air into the cylinder through ports in the side of the cylinder. The exhaust exits through the top of the cylinder head via conventional four stroke style poppet valves.