The stock fuel pump runs out about 270whp, plus they are just plain old. These pumps have been tested to over 500whp (on Toyota MR2 applications, we haven't pushed an Esprit that far yet).
This kit includes the upgraded pump and installation kit. The old wires must be cut and new connector crimped on inside the stock pump hanger. Don't be a hero and try to solder and heat shrink it because gasoline dissolves heat shrink. Fuel-proof crimps are included. Also hose to eliminate the fuel pressure dampner is included. Elimination of fuel dampner is optional.