remove entire USDM front end, using drill bits.. drill out all of the spot welds that hold on the stock core support, remove the support and cut a little bit on the sides of the stock frame to make room for the bigger JDM headlights. test fit the new support and make any necessary adjustments to make it fit good, then bolt or tack weld it into place using ALL of the spot weld holes. bolt up the lights, fenders, hood, latch, JDM bumper support, bumper and you should be good.