THESE ARE A GREAT AFTERMARKET MUFFLER FEW WOULD BE ABLE TO TELL THEM FROM THE OEM HONDA CAN'T BE SURE BUT I THINK THEY WILL LAST AS LONG AS THE OEM TOO.. AFT102 CLICK ON PICTURE TO EXPAND CLICK ON PICTURE TO EXPAND CLICK ON PICTURE TO EXPAND CLICK ON PICTURE TO EXPAND CLICK ON PICTURE TO EXPAND @ BIGGER DIAMETER FLANGE