Radium Dual Fluid Lock Catch Can Kit - Toyota Supra A80 93-02These catch cans vent to engine (VTE) permitting a true PCV system. The 2 catch cans function completely independent of each other and do NOT vent to atmosphere (VTA), thus are emissions and track legal. Closed loop systems remove the oil and sludge from the PCV gasses before it is routed to the engine to be burned. A closed loop system also promotes negative crankcase pressure for optimal performance. Furthermore, closed systems prevent unwanted oil