This is a genuine AST 5100 Series Damper/Spring Kit (inverted, 1 way, front top mounts) BMW ACT-B2102S/3 Suspension from MG Auto Motorsport, designed to fit the following vehicles:
BMW M3 F80 PRE LCI 2012-2015, 3,0 TwinTurbo ’14 – present
BMW M4 F82 PRE LCI 2012-2015, 3,0 TwinTurbo ’14 – present
Front Top Mount: 440.4521739
Rear Top Mount: 304.2782609
Works with OE top mounts DLA-BMW4-S Droplinks needed. Please order separate.