My car 12 year old exhaust system Vehicles exhaust system plays an important role to reduce noise from the engine. Some just install aftermarket unit just to look good while some did it for performance. Don’t be fooled by those ricers with extremely loud kapchai sound which for me is very unpleasant to hear and just for show off but speed like a tortoise. A poorly setup exhaust system not only provide lesser power but will also affect fuel consumption too. General speaking, not all exhaust unit did fit nicely into every types of engine as there are many kinds of aftermarket exhaust systems to look for. Consult the professionals and think twice before really getting a unit for yourself. One day, I notice my Proton Persona exhaust sound had become very loud like a modified Wiralution with addition of metal knocking sound at the back of my car during movement. “Prraaanng! Prraaanngg! Prrraaaaannngg!!!” So, I thought it is just some rubber mounting broken and causing the exhaust