Excellent report, good for someone new to cars and trucks. I have a 2010 BMW 535i x push and am aiming to incorporate some performance towards the turbo/engine from the exhaust. Amar – Buy a muffler, one thing sized on your car or truck. You could keep the OE muffler https://m3-g8019753.salesmanwiki.com/9075143/5_simple_techniques_for_bmw_m3_g80_catted_downpipes