Any nitrous system wouldn't be complete without a proper filtration system. Keeping contaminating particles out of the N20 solenoids and jets is vital to the integrity and longevity of the system. NOS Hi-Flo In-Line Nitrous Filters feature reusable 140-micron stainless steel mesh filter elements that are easily removable and even easier to clean. Constructed out of aircraft-type aluminum, these filters are compact to save space and weight, but won't restrict the flow of nitrous in the system. Available in various AN sizes, each in-line filter is anodized black or 'NOS bottle blue' for great looks and corrosion resistance.