sr20det, very easy to get. bullet proof. My wife drove one for over 4 years 60 miles a day with no problems. I dynoed mine because it wasnt running enough power when I put it in a g20, 258.7hp, 258.2 trq. at the wheels(about 310 crank) and that flooded itself. by 2krpm it was under 10/1 and never came back. Turns out the return line was smaller in the g than the sentra I had!