2.50-inch entrance× 7-inch long, 3.0-inch× 3.75-inch exit. For some original performance cars and modified cars, the phenomenon of exhaust and fire breathing will appear. The main reason is that the engine ignites when adjusting deviation, and the exhaust temperature is several times higher than that of ordinary cars, so as to avoid ablating the rear bumper of automobiles. Therefore, it is very necessary to install carbon fiber tailpipes at the exhaust end of this type of vehicle.