About 6 months ago I installed a set of Whisper maf ends. I had my factory ends home ported, but I didn't do a great job (though I felt a nice sotp gain). I ran my ported factory ends for a year with no unlocking problems, including 5k on my Vig. Shortly after I put the Whisper ends on, I started having unlocking problems. Wasn't too bad and it went away after awhile. Last month it started again and was worse than ever. 50% of the time, the converter would be unlocked. It got unbearable, so I tried the factory ends again. The problem instantly went away, and 200 miles later it hasn't unlocked yet. Just thought this might help someone <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

Calibrated Z06 maf screws with my lockup. Stock with screen is by far the best for drivability and lockup.