I realize everyone else has mentioned this, but we can not stress enough on getting a new chargepipe before you do anything else. It WILL blow up on you.
Also, the coolant line isn't a mod but that boy will crack on you. I also have a 2016, and at ~40,000 miles it cracked under light driving conditions (like 35 mph).
Then get that BM3 tune. Best bang for your buck by far!
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2016 M235i 6MT | VRSF Intercooler | Active Autowerke CP | VRSF Catless DP | M Performance Muffler | BM3 Tuned | 18" Alzor 030 Wheels | 8.8" Display & Apple CarPlay retrofit
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