Hey i just bought a 1991 500 polairs snowpro and the last owner put racing pipes on it but didn't jet it. it still has the factory 280 jets which i think they are factory. And now i need to know what to jet it for these racing pipes before i can drive it . And how much more power are pipes suppose to give you ? Also how fast would this sled go in mp/h just wondering? If anyone clould answer any of these questions it would help me out alot.