E thehiloe mathoasong a lilemo tsa bo-1980, ke moetsi ea hloahloa oa li-mufflers tsa lithuthuthu.Ho na le basebetsi ba fetang 800, ba nkang sebaka sa lihekthere tse fetang 200, ba nang le thepa e tsitsitseng ea li-yuan tse limilione tse 300 joalo ka lithupelo le lisebelisoa tse fapaneng tsa mochini.Matla a tlhahiso ea selemo le selemo a lihlahisoa tsa li-muffler a fihla likotoana tse limilione tse 3.5, tse ikarabellang bakeng sa 30% ea 'maraka oa OEM oa sethuthuthu sa lapeng, o behiloe pele Chaena.Sebaka sa pele tlhahisong ea lihlahisoa tsa lithuthuthu tsa muffler.