I bought the Doug's cut out and was not impressed with their Y pipe. It is cheap, not stainless steel, and uses tiny band clamps. I've upgraded to a Magnaflow Y pipe, but had to modify the cut out to fit.
I did have problems with the cut out, only because I drove through water with it open. Pertronix repaired it and/or replaced the motor. About a month later it died again. This time, I took it apart myself (No I don't have pics). What I found was a shit ton of tiny gears, all seized up. The motor was fine, so I pulled all of the gears out, cleaned them, and lubricated them heavily (the gears were not lubricated at all and is probably the cause of most their problems. It has worked fine since.