To the OP. You may also want to take a look at the Vibrant GESI HO series catalytic converters. We helped with some of the initial testing on these cats prior to their release. They are a very efficient and high flowing alternative to going catless and feature a full metal catalyzer that has held up well on turbocharged vehicles. Our beta test set is showing no signs of failing after two years of abuse on a 996 turbo. The 996 turbo is a perfect vehicle to test catalytic converters on as they are placed directly after the turbo and will have significant stress placed on them.
PM Me if you need some more in depth information or photos.
http://vibrantperformance.com/catalo...1022_1063_1326