For F22 and F23 chassis with B48 or N55 engines - not for G42 - these AC Schnitzer springs deliver a measured 15-20mm drop on M Sport spec cars (M235i/M240i), and ~30mm on SE models. They’re a fast-road or stage 1 setup: sharpened turn-in, reduced dive and roll, zero compromise on damper compatibility.
Fitment is precise: F22 Coupe and F23 Convertible only - confirmed for B48 (M240i) and N55 (M235i), not B58 or G42
Drop is predictable: 15-20mm front/rear on M Sport suspension; SE models sit lower but retain factory ride compliance
No re-valving needed: Designed to work with stock dampers - ideal for daily driver, track day or show car intent
Search terms covered: F22 lowering springs, F23 sport springs, M240i stage 1 suspension, M235i fast road springs, B48 decat-ready stance, N55 track day setup
