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Updated with my BMW 520i
Recently I've installed few items.
K&N Filter
Evolution Racewerks N20 4" Catless Downpipe
TMC ECU
Surprisingly result comparing with stock engine.
Better torque, Faster response and additional driving experience.
Anyone know is there any other tuning parts for BMW 520i N20 engine? (Besides: Exhaust. )
Stan
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