I'm very close to my service advisor at Field's BMW in Orlando.
They've only had 2 N20s have timing chain failure. Ever. There's no stress or reported failures of any N20 due to a Burger tune. They'll run forever at 260whp. If that means I get 35i speed for thousands less hell yeah. The 35i is statistically less reliable. It's not a good motor it's been plagued with failures of all sorts from day one.
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