saying the gsr is equal to the prelude 5speed vtec is the same as saying the 99-00 civic si = prelude 5speed vtec = integra gsr. They are not, actually the 99-00 is closer to the gsr, but it goes more like this for factory dohc vtec 4 cylinders: base rsx = ep3 si < 2nd gen GSR = del sol vtec < 99-00 si < 94-01 gsr < 93-01 prelude 5speed vtec < CTR < ITR = RSX-S < S2000