Is anyone else using a Greddy Type RS Blow Off Valve? I ahve an 07 Fst Switchback and put one of these valves on the sled an it doesn't really seem to blow off unless you are at really high boost when you let off. I machined a flange and welded it right to the stock intercooler piping right behind the intercooler. I have the valve set all the way loose and it just doesn't seem to work well. The sled sounds like the turbo shutters at lower boost insted of blowing off. I was just wondering if anyone ahs any input or has had any problems like this.