Mine is a 99 and match's the one above. I know there were alot of differences in the 99's maybe this is one more. This is what the advance auto page pull's for mine...

Fuel Pressure Regulator by BWD - Part 22856 - Advance Auto Parts

Was there a noticable difference when you changed it out? Mine seems to drop in power after 3500 rpm's, never even had it past 4k and I hear this motor really opens up after 2300????

Not my experience. 2300 to 3200 is great but thats it, above and below that the fuel mileage isnt worth the power output.