M52TU/M54 Air Filter Upgrade

Don't install silly hot air intakes! Most brands are actually worse than the stock plastic airbox. Instead, you should keep the stock airbox and upgrade the filter for best performance and longevity. The stock airbox is very heat resistant and ducts colt air to the engine well. This aFe filter is oiled and reusable. It's very high quality and what we use in our own E46 drift car.  OEM+ is just sometimes best.