I know this is an old post that keeps getting revived, but I didn't see any other engine tuning threads via search.
Does anyone know of a reversible tuning option for an X1 B48 20i? It's a common model available outside of the U.S., I believe the engine is basically a de-tuned 25i/28i.
I'm in Korea and the tuning scene here isn't very good, not on a niche product like the X1 (90% of cars on the street are Korean).
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