When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I suspect the drawback is what you will spend on it over a regular vented cap. Only one though, you need the vacuum pvc operating & sweeping the engine.
Thanks, definitely putting the pcv valve on and connecting to carb or spacer. Only reason for the independent breather filter is that an aftermarket air cleaner is very likely.