yeah i have heard of it, i have it as well. if you attach the recirc hose to the pipe GReddy supplies then you will need to cut the hose to install the pipe. which sux cause then if you ever want to put it back to stock, you cannot because you cannt connect the hose back to the stock bov.

i took mine off because mine was defective. but its an awesoem BOV. and mine was first installed correctly with it recirculating the air, but i could not tune it because i coulndt hear if the valve was tight or loose so i took the recirc pipe off and made it vent 100% atmospheric and it was awesome until i had a leak from a stripped bolt.