I have used both the PI converter and now a Protorque converter and I went with the Protorque because they are 15 minutes from my house and it has a stronger lockup clutch. This is important when you are putting alot of torque through them. For some strange reason, I was blowing through the PI converter even after they tightened it up and the stall was all over the place. Both are awesome converters, but I have had the stall changed in my Protorque converter 3 times and it's much easier handing them the converter than dealing with shipping time and charges.
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