bro,even s-flow muffler u must also be careful,dun simply buy coz like my case,i driving persona1.6 auto,i install my s-flow muffler at wai heng kota damansara,then after a while,the muffler inside got carbon stuck there,when i rev till 3k will have sound like metal a bit 1,there is no solution to this 1,i asked them already,so i just live with it since it doesn't involve my car performance at all,i want to ask you,when you bought the muffler frm them?coz the sound will change 1 after 2-3 weeks u know?at first when you change is loud,then after a while the sound will go softer.
i bought it last friday.....doest that mean I need to try about a month to know the exact sound will produce?
erm....if this is the case.....i will observe for 3 weeks see the result lar...anyway....i will go do whole car sound proof soon. hope will reduce the sound too.....


