Njengoba imithetho yokuvikela indawo ezungezile iqine kakhulu ezimisweni zokuphuma kwezimoto, akukhathaleki ukuthi ungenzi lutho, uyashesha, ukushayela ngesivinini esiphansi, ukushayela ngesivinini esiphezulu noma ukwehlisa isivinini, zonke izimoto kufanele zihlangabezane nezindinganiso zokukhipha umoya.Ngokubhekana nemikhawulo enjalo eqinile, ngaphezu kokuzuza ibhalansi phakathi kokusebenza nokukhipha, into kuphela i-catalytic converter.Isiguquli se-catalytic ngokuvamile senziwe ngezinsimbi eziyigugu, okuhlanganisa i-oxidation catalyst, i-catalyst yokunciphisa kanye nesiguquli se-catalytic sezindlela ezintathu esisetshenziswa ezimotweni eziningi.Ngemuva kokukhipha amandla amaningi, isiguquli se-catalytic sixhunywa ukuze kuguqulwe ukungcola okungashiswa ngokuphelele kube izinto ezingenabungozi ukuze kuvikelwe imvelo.

Ixhunywe ku-muffler kusuka kusiguquli se-catalytic.Ingxenye yesiphambano se-muffler yinto eyindilinga noma eyi-oval, ehlanganiswe ngamapuleti ensimbi amancane futhi afakwe phakathi noma ngemuva kwesistimu yokukhipha umoya.Kukhona uchungechunge lwama-baffles, amagumbi, ama-orifices namapayipi ngaphakathi kwe-muffler.Ukwenzeka kokuphazanyiswa kwe-acoustic reflection kanye nokukhansela kusetshenziselwa ukwenza kancane kancane amandla omsindo kube buthaka, ukuze kuhlukaniswe futhi kuncishiswe umfutho oshaya ngamandla okhiqizwa isikhathi ngasinye lapho kuvulwa i-valve yokukhipha umoya.