How does this work?
 

http://cgi.ebay.com/ebaymotors/RVM-G...18297629QQrdZ1

Does anyone here have one of these and does it work well?

its a basic bleeder valve or ball and check valve,, it has a adjustable spring that applies pressure to a check ball valve inside that will will bleed off pressure to fool the waistgate actuator into staying closed longer and creating greater boost pressure.. works great... just dont over do it...