I did this about 4 weeks ago on my 2000GT. You'll need to cut off the plug that's on the stock pump, and write it in place of the one on the 03 Cobra Pump. The wires lines up, but the plugs shape are a bit different. That's all ya gotta do......otherwise it goes right in with some grunting and pulling.
Oh, and good luck with the blue evap. canisters, they're a MAJOR PITA.
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