Hey guys, just installed a Bully Dog blow off valve on my lbz. Problem is that I'm running a straight 4 inch pipe no cat no muffler with a Bully Dog intake manifold and my exhaust is LOUD! Has any one installed this BOV on an LBZ. I'm having trouble setting the three switches to the proper setting and I cant tell if the valve is opening when I let off the accelerator because the truck is so loud. Any input would be much appreciated.

I think you are refering to a BD Diesel Blow off Valve, not Bully Dog right?

yes, sorry.