Process West Terratuff SEPR8R Air Oil SeparatorInlet manifold pollution is the enemy of any diesel engine, particularly the Common Rail high efficiency engines that make up the majority of current 4x4s. To counter this Process West have developed the TERRATUFF SEPR8R, an advanced catch can system for your 4x4 that uses state of the art industrial filtration methods and integrates them into a seamless and properly engineered kit that will bolt directly to your 4x4. TERRATUFF SEPR8R Design Philosphy