Well if you have a race pipe then it's not a stealth anymore. you can only run one or the other. The stealth muffler and Race pipe are the same section of tubing in the system.
The differences are, Race= 1 muffler, Stealth= 2 mufflers/resonators. They say a picture is worth a thousand words. http://www.focussport.com/exhaust.htm
Hope that helps.
Lets try that again. If you go to the FSWerks web site and look up there exhaust page its right there, Race exhaust on the left and stealth on the right. The only difference is in the first section of pipe that connects to the Flex pipe. Race=straight pipe / Stealth=resonator. Hope that help this time.