mind to share which exhaust shop u went in ampang ? i did mine at AhPoa exhaust shop..(yellow shop beside 7-11 ) so far it's still doing fine with the setup https://www.google.com.ph/maps/@3.150102,101.761729,3a,40.4y,59.05h,93.14t/data=!3m4!1e1!3m2!1sEPRHvKJudfqkNC2NBBY3GA!2e0!6m1!1e1 , u...