Cov kua muffler tshwj xeeb yog nruab los txo cov suab nrov ntawm kev sib txhuam los ntawm cov pa roj thiab cov kua hauv dej, thiab tseem ua rau lub tshuab nqus tsev siab dua thiab ruaj khov, tiv thaiv corrosion, tsis muaj kuab paug, tsis tshua muaj suab nrov, txav tau yooj yim, thiab lub tshuab nqus tsev kho valve tuaj yeem nruab. Raws li cov neeg siv khoom xav tau thiab kev tuav tau yooj yim heev.