Yes the camso challenger extreme 2.5 would be a good drop in replacement. No changes needed, should be under $650 new. Takes about an hour to change a track on a quickdrive sled.Be aware, Camso makes stock Camo Extreme 2.86 replacement tracks in 155 and 163, also, for stock drivers. Dual ply, fully clipped. No impact on gearing - when talking driver impact on gearing, always have to spec both pitch and the number of teeth on the drivers, FWIW.