540 - SKIDDER, LOG 15 AIR CLEANER, MUFFLER AND MANIFOLD Parts group 15 AIR CLEANER, MUFFLER AND MANIFOLD 15 AIR CLEANER, MUFFLER AND MANIFOLD . AIR CLEANER [01C12] EXHAUST MANIFOLD AND ELBOW (WITH TURBOCHARGER) [01C13] AIR INTAKE [01C14] EXHAUST MANIFOLD (WITHOUT TURBOCHARGER) [01C14] AIR INLET ELBOW (WITH TURBOCHARGER) [01C15] AIR INTAKE PIPE (WITH TURBOCHARGER) [01C16] VERTICAL MUFFLER [01C17] SHIELDED EXHAUST AND SPARK ARRESTING MUFFLER [01C18]