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Message: <blockquote data-quote="nitrus" data-source="post: 998135" data-attributes="member: 19770">friends and bros ... i reli reli need help ...i juz changed to 4-2-1 extractor and replace one thing (look like small-muffler box liddet in the middle underneath my car.. Wats this box ar?), replaced that with a bullet silencer...then now i noticed my bassy exhaust sound not so loud ady. .. but now it has this sssssssssssssss sound .. like "zzzzzzzzzzz" kind of sound .. quite annoying la ... only when my car moving will have this sound, why ar? If my car not moving and i Rev, dun have that "zzzzzzzzzzzzz" sound .. What happened?I sent back to the shop 1 time last week ask him check, there was a leaking in the pipe near the CAT in front there .. so he weld back ady.. Then after that still got the sound.. send again today he said the sound is from the pineapple (CAT converter) below front there... he say gotta change shorter CAT coz my CAT too long... true ar? my fren said it's not true..damn annoying la the sound especially when i moving slow and not hi-revving ... like got "zzzzzzzzzzzzzz" when slowly picking up.. :frown: can anyone help me plzzzz... Or issit normal to have that sound after changing extractor/bullet for my Proton Saga LMST ?One more thing is, my car idling is at 1000rpm, he say it's quite high. should lower... if not waste fuel and dunno wat .. Next time service shud i ask Proton service lower the idling timing abit ?sigh.. i hate problems... :help:</blockquote>

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