This is not directly answering your question, but i recently purchased a girdle from RJC Racing, and i was amazed as to the quality of the piece. I spent an hour talking to jason about his prduct and you can really tell that he has worked out all the kinks in his setup, all the way down to the spacers that fill in the hole that the oil pan bolts went in. I also highly recommend the crank scraper as well. It serves two purposes: the first one is obvious, reduce parasitic drag, and the secon is to keep oil from splashing on the side of the block and eventually causing oil pan gasket leakage.
I have no experiece from CAT, but i wouldn't even think twice about Jason's products!!!!
Hope that helps
Adrian