Parts & Accessories Spare parts The muffler with downpipe and headers, all parts are 3 inches. Hilux clutch differentials. Hilux KPG muffler. Patrol Skyline muffler. Patrol Hyperflow muffler. Patrol 3-inch 6-to-2 headers with downpipe. 3RZ cylinder, 50, needs boring. 3RZ crankshaft, 0, needs boring.