How a Magnetic Billet Oil Filter Housing Cap Protects Your BMW's Engine BMW engines represent precision German engineering at its finest, combining performance with longevity when properly maintained. Among the aftermarket upgrades gaining popularity with enthusiasts and practical owners alike is the magnetic billet oil filter housing cap for BMW. While seemingly a small component, this specialized cap plays a crucial role in extending engine life through enhanced protection against one of the most damaging elements found in any engine system: metal particles. Click here for more info: https://paradigmengineering.co/blogs/news/how-a-magnetic-billet-oil-filter-housing-cap-protects-your-bmws-engine