Seller notes

The stock diaphragm on the gen 1 B58 Valve cover is fragile and can crack or tear over time. This will lead to loss of crankcase vacuum and smoking. The VTT PCV cap replaces the factory plastic cap with a billet aluminum piece that uses a Billet Banjo fitting, and our Vaccum/Boost adapter to move vacuum directly from the head ports to the manifold. Thus getting rid of the fragile system and replacing it with a robust solution. This cap will also allow you to run a catch can on the low side if de...

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