Anybody have any first hand experience with Moroso Spiral Flows for a turbo application? I currently have Flowmasters from the previous owner. It had a Vortech S trim on it when I bought it and now I am going turbo. I had a friend of mine give me a pair of spiral flows the other day. The center section is straight through and measures about 1 1/4" and the rest of the exhaust gases go through the spiral part on the outside. I know that they have to be better for the turbo than the Flows but I was looking for someone who had them to get their opinion on how they helped or hurt performance.