hi Jeffy, thank you for the advice. so u reckon that i better go for magnaflow, more than vibrant muffler? before, i read the topic about the guy form mel with his MONSTER camry 07 LE ( sure u remember that) and yeh, saw him first install the vibrant 2'25 then change into magnaflow. if vibrant, i found this on ebay http://www.ebay.com.au/itm/Vibrant-1145-STREETPOWER-FLAT-BLACK-Oval-Stealth-Muffler-2-25-Universal-/300848524965?pt=Motors_Car_Truck_Parts_Accessories&hash=item460bf82ea5&_uhb=1 or this for magnaflow: http://www.supercatconverters.com/product/magnaflow-muffler-14851-34567