The 400EX and 450R Widening and Lowering Kits are the same.
The kit uses all of the same components as the widening kit, except the shock widening components are not included. By widening the mounts for the a-arms, but keeping the upper shock mounts in the stock location, the suspension “squats” and lowers the front of the ATV by about 3 1/2 inches on the +6 inch widening and lowering kit. The +4.5 inch widening and lowering kit lowers the front by about 2 1/2 inches.
Stock brake lines should be long enough to install either the +4.5” or the +6.0″ kit on the 400ex and the +4.5″ kit on the 450R if you disconnect the intermediate brake line support on the a-arms to provide more slack in the lines. The 450R brake lines will probably not be long enough for the +6.0″ setting.
Diamond J Customs does sell brake lines if you would prefer to use extended-length stainless steel braided brake lines with your widening kit.
Instructions Download: H400_SWID_tri-fold_instr