Commentaire: Per the vendor this muffler is not specific for our JLG machine builds. For the proper service replacement please see the options listed below. If ordering this muffler for JLG Base Engine p/n 1001128947 use muffler p/n 70005445. If ordering this muffler for JLG Base Engine p/n 1001145758 or JLG Base Engine p/n 1001170617 use muffler p/n 70005446.