Kills brake squeal on Sumitomo 4-pot calipers without compromising pedal feel.
Cheap shims rely on adhesive alone and migrate under heat cycles, letting noise return within a few track sessions. The MSB unit combines mechanical location tabs with the adhesive layer, so it stays put when calipers get warm. At $26 for a full axle set, it's the sensible fix before a pad change turns into a squeal diagnosis.