Slp made twin pipes. They didn't make any more power than the stock pipe from what I understood.
They are worth what someone is willing to pay for them. Your target audience will be someone restoring an old sled or someone who doesn't know any better.
A forum community dedicated to snowmobile owners and enthusiasts. Come join the discussion about performance, racing, troubleshooting, trails, maintenance, riding tips, modifications, classifieds, gear, and more!