Good advice there.
The RSFB inserts or 2 piece or the full M3 version. They really help settle the rear end handling.
I used the inserts and had it done at a local Indy shop. Wasn't too much & to this day the best thing I've done to the car.
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2011 135i w/ DCT | ZSP Sport Pkg | PPK | Ohlins R
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