Intend to remove my catalytic converter becos got some "rattling sound" when rpm reaches 1,500 when slow moving traffic, can hear sound loud and irritating.
I realized that by removing the converter, I am contributing the harmful exhaust emissions to the enviroment. sorry Earth
Please advice any brothers/sisters who had done this b4 on their E39 and do it make any error reading.
thank u for your valuable comments/advices