I know of a few people that have done it in the past. I don't think the sleds are around any more. They bolt on, but I can't remember for sure, but I think the belly pan has to be modified, but the hood doesn't fit perfect anymore. There is gain in HP but I don't know how much. I doubt that's the same as you would get from a set of Benders, CPRs or Haucks, because those are tuned for the red-heads. But I don't really know. I have a friend that used a set of after market pipes, and modified them to fit an SRX muffler. They sounded very mellow, and certainly still gave you more kick, you could tell when you rode it. I don't remember what brand of pipes he used.