I have posted earlier about the issues of just adding my TBR CF dual exhaust. It's was Running to lean , Backing firing, burning thru baffle packing at rapid rate,popping noise when I slow down etc. I just added the PCV and it made all the difference. Ended all issues and changed the throttle by making it much smother. It's like a new bike. I can really appreciate these pipes now because they are working correct and have taken my ride to a new level. So out it out there now.....the PCV in a Rss with these pipes is worth the money and will fix your problem!!