I just ordered the agency power adjustable blow off valve. I must admit im alittle excited, this is my first engine mod since i put on the aem intake last year during summer. I have been searching for a good aftermarket valve and i was stuck between GFB and AP. Finally i found a vendor UltraREV selling the AP valve for only $155. There reasoning was it was a bad color batch. The guy called me and said the valve is 110% structurally sound but he has been receiving complaints because the color on the flange is a different shade from the color on the housing. Me personally i really didnt care so i went ahead and continued with the order. It should be in today. Im already tuned so im just gonna set it to 50/50 and hope it doesnt cause any issues. Most people say 50/50 is a good reliable setting with no negative feed back so it should work.