Remove upper and lower radiator hoses for waternecks.
Remove lower waterneck, remove thermostat.
Replace thermostat with provided gasket/disc.
Replace lower waterneck.
Remove upper waterneck.
Remove stock bypass tube
Replace stock bypass tube with provided blocking tube
Reinstall upper waterneck (replace gasket if any damage has occurred when removed)
Reinstall upper and lower hoses.
Refill with coolant. It is best to raise front of vehicle as high as possible to remove possible air pockets.