Nissan S13 240SX (All models/trims/RHD/LHD)
Nissan S13 Silvia (All models/trims/RHD/LHD, excluding CA18DET)
Nissan S13 180SX (All models/trims/RHD/LHD, excluding CA18DET)
Nissan S13 200SX (All models/trims/RHD/LHD, excluding CA18DET)
Radium Engineering catch cans feature large 10AN ORB ports, a 4AN ORB drain port, 2-step oil separation baffling, and an O-ring sealed dipstick. These kits mount using factory holes and integrate perfectly with the surrounding components. They 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 vapors from entering the cabin. The dipsticks built into the catch cans allow easy inspection of accumulated fluid. No cutting, drilling or permanent modifications are required. For more information on Radium catch cans, CLICK HERE.
20-0725 CATCH CAN KIT, PCV, NISSAN S13
The PCV catch can kit runs inline between the PCV valve and the intake manifold. It mounts to threaded bosses on the RH strut tower just clear of the fuel filter. 
When the intake manifold pressure is close to or greater than atmospheric pressure, the PCV "check" valve closes and, thus, this hose experiences no flow. Conversely, the PCV hoses will experience "metered" vacuum when the engine is idling, steady state cruising, and decelerating. This would normally draw unwanted crankcase vapor, unspent fuel, and oil sludge into the intake manifold immediately after a high load run. 
INCLUDES
-Baffled oil catch can
-Nissan specific mounting bracket
-AN adapter fittings and hose ends
-Stainless steel hardware
-Radium PCV hose
NOTES:
1. The PCV catch can kit is compatible and recommended to be used with the CCV catch can kit. See 20-0726 below.
2. No extra inline check valve is required since Radium catch cans are pressure sealed.