About the plate issue, we have found that the # 10 plate seems to work the best with a GSK. Haven't figured out why, but it is really nice. As far as exhaust, i went with the Jardine exhaust and am very pleased with it. The install was so cake it wasn't funny. The bends in the whole exhaust are very nice and no real tight curves at all for better flow. If you have the #10 plate, you could even think about getting a HX-40. This will keep you out of EGT problems.