BMW prices are high for sure but for catalytic converters the price is proportional to the length of life. It contains all the expensive metals: platinum, palladium, and rhodium. The more it has the longer it can stay in service.Yeah. Carb is good but crazy expensive.
CA is so much cleaner than 25 years ago. I remember the smog hurt your lungs going to orange county, coming from a distant suburb of LA with clean air.
I was quoted $1781 for a shop to do two new cats CARB for my e46. Cheaper than buying them myself due to wholesale. Compared to a 2003 corolla CARB cat $331. Quite a difference.