All BBK "cold-air-induction" systems utilize a high-flow washable conical cotton element filter and most are designed as fenderwell units to maximize performance. In addition to BBK's standard hand-polished and chrome plated systems, BBK now offer a variety of kits utilizing a custom designed lightweight aluminum inlet casting which is hand-polished and chrome-plated. These trick castings deliver unmatched quality and a custom fit for a variety of auto and truck applications.