The BMW E9X M3's S65B40 V8 uses a dual-airbox setup with two panel filters, one for each bank. The factory paper elements include a charcoal-impregnated lining that reduces airflow for emissions compliance. The Macht Schnell S65B40 High-Performance Panel Filter replaces both factory elements with cotton gauze that flows more freely and eliminates the restrictive charcoal layer, while keeping the sealed factory dual-airbox housing fully intact.
Each filter is built to the specific geometry of the S65B40 airbox and seals tightly for zero bypass. Multi-layered pleats increase filtration surface area and maintain 99% debris capture efficiency per ISO 5011. Note: 2010+ US models and all EU-spec E9X M3s require the Macht Schnell Filter Adapter (sold separately) due to a centering pin design change in the factory airbox lid. Washable and reusable.
Brand: Macht Schnell
Fitment: BMW E9X M3 (2008–2013)
Engine: S65B40 V8
Construction: Multi-layer cotton gauze — charcoal lining removed
Filtration efficiency: 99% per ISO 5011
Airbox: Factory dual-airbox retained — no modification
Adapter required: 2010+ US models and all EU-spec E9X M3 (see filter adapter listing)
Maintenance: Washable and reusable
