For those that used the stock tips, Did you only have to order exhaust part number? Did you also have to buy the adapters? I am planning to get the diffuser as well, so I would purchase the part number for use WITH the diffuser. (Although I can't seem to figure out what the difference is? Tip length?)
These are the 3 part numbers listed on BMWUSA.com:
BMW M Performance Exhaust / With Diffuser 18302286673
Chrome Exhaust Finishers - Required 18302354364
BMW M Performance Exhaust Pipe Finisher Adapter / M235i 18302287042
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