Parts & Accessories Spare parts BTM catback with electronic muffler and all its accessories (without warranty). Right exits. Muffler size is 3 inches. Muffler valve thickness is 4 mm (the highest thickness of usual valve plates). The benefit is stronger resistance to throwing and breakers. BTM catback with the (electronic) device, 3 inches. One year warranty on welding. Steel 304. Light use. It was installed on the car for less than a month. 🚨🚨 The catback is like new and still under warranty. Serious buyers only. Serious buyers only. Serious buyers only.