I don't own them, but I've driven couple cars with Primera motor. One was the actual P11 Primera 2.0 in Japan, another one was the Swaped from US SR20. Yes, it did feel more powerful (torquey) than regular U.S. spec SR20. Two classic SE-Rs raced 1/4 and one with JDM motor with stock cams was actually faster (about 0.3 sec) than U.S. spec with JWT S3 cams. they both had aftermarket header and a few bolt on mods.wickedsr20de said:I just want to know for all you guys with the JDM 10 to 1 motor ----How much of a difference did you feel compared to your us spec sr20de?