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Mine's an m20b25 rear exhust box and I have had it "rebuilt" by JFA in Sunway.The innards looks like so:So they cut it open,replaced the corroded and holed pipes,wrap fiber over it and welded it close.I requested Jaafar for as original a set up he can make(you have a choice).The outcome was not too good.The noise was better than before.After 1 month,till now,the noise became louder at idle but not noticeable at speed.
Mine's an m20b25 rear exhust box and I have had it "rebuilt" by JFA in Sunway.The innards looks like so:
So they cut it open,replaced the corroded and holed pipes,wrap fiber over it and welded it close.I requested Jaafar for as original a set up he can make(you have a choice).The outcome was not too good.The noise was better than before.After 1 month,till now,the noise became louder at idle but not noticeable at speed.