我的车muffler与extension pipe分开,muffler上还有两个小孔。于是到speedy, midas and Mister Muffler去检查和估价,在Speedy换muffler要$196+tax;在Midas检查后,告知需换两个extension pipes and muffler,但我看那两个管子焊接处表面是有点锈迹但并不严重,也没穿孔。零件费加一块$470, labour$170, plus tax total is $736. It's so expansive! 我又去了在Carling 的Mister...