Im trying to decide which brand of pipes to put on my sled. I have been looking at PSI,HOTSEAT,and SLP. Im not sure which brand to purchase. I also have to decide if I should go with twin or a single pipe. I know with the SLP pipes you have to change the domes and use octane booster. If anyone has purchased any single or tripple pipes for there 800 xc please give me some feed back. Any information would be helpful Thanks.