Mishimoto In-Line Pre-Filter (-6AN)As much time, energy, and money as we invest in our vehicles, it makes sense to care for them properly and perform as much preventative maintenance as possible. This new addition to the Mishimoto lineup, our AN In Line Pre Filter, is a simple way to add an extra filtration stage for your transmission, differential, or engine oil pump system. Offered in popular AN sizes from 6AN to 12AN, this in line pre filter unit is compact enough to fit in cramped