Not sure where "arctic sledder" got the twin pipes unless they are for the 98-2000 chassis. I don't think anybody currently builds twins for it. We have three in our group. The gals love them. We put on cans, 2" riser blocks, temp guages, 151x2 on two of them and 153x2.25 on one which will fit under the existing tunnel. I am currently doing a 162x2.25 on another one with a 12% gear reduction. I think it will do just fine.
Good sleds, I know my wife doesn't want to step up to an Mseries, likes her 600 a lot. I will end up with 2 of them, a 151 and a 162, so she will have her choice.