Ultimate Oil Control System

The Killer B Motorsport Air-Oil Separator provides an efficient solution for managing crankcase gasses in 2002-2007 Subaru WRX and STi engines. By utilizing the turbo inlet as a vacuum source, it effectively draws gasses from the crankcase during boost, which can lead to improved ring seal, reduced oil consumption, and higher power potential. Unlike systems that rely on restrictive media or baffles, this separator utilizes accelerated gas flow to force oil droplets out of suspension via a centrifugal process, allowing collected oil to drain back into the oil pan. Constructed from billet and TIG-welded 6061-T6 aluminum, the unit is designed for durability and ease of maintenance, featuring a six-bolt top for quick inspection. It is manufactured in the U.S.A. and features push-lock barb fittings that eliminate the need for hose clamps. The design specifically avoids heating or cooling elements to maintain a lightweight and simple profile, ensuring consistent performance for daily drivers, autocross, and high-horsepower applications exceeding 700whp. Each unit is backed by a lifetime warranty.