thanks all bro advice and comments. will order some need string silencer and sts bumper. c how it works out.
Update on the loud bow.
I ordered STS bumper and new VEM from Martin Archery, suprising, it arrived at my door unexpected fast. didnt expected it to arrive that fast (Only take up one week). because im all the way from Malaysia, and usually arrived 2nd or 3rd week which i have get used to it. Thanks Martin Archery.
Replaced it last night. and shot it this morning, Amazing, the bow is muted.
I will say, STS bumper does have life span, the old sts bumper looks good in condition but does not work out to the max. Replaced with the new one, and the bow now is very quite...