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Helps catch oil fragments that exit the valve cover. The stock bung on the valve cover is normally baffled to prevent oil from exiting. Sometimes even if you use the stock valve cover breather hole oil fragments will exit and enter the intake or exit on your engine or ground depending on your setup. When turbo its best to put a nipple on the intake tube between your turbo and air filter. This nipple creates some vacuum helping to suck old air out of the valve cover and crank case.
For more hardcore race applications its normal to weld two bungs to the valve cover. Those bungs unless custom are none baffled. These bungs will catch alot of oil. If you are going this route you will want the race catchcan as its volume is larger and ment for more airflow. |
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