Wow theres alot of question you didnt mention. Ok first off there arent any B20Z's in Japan they all JDM motors where stamp B20B. 99-00 B20's have a knock sensor, regardless of where it comes from, which signifies the high compression 9.6:1 motor. If your B20 does NOT have a knock sensor, it is not the 9.6:1 compression motor.Second off, your motor is it running an aftermarket pistons rods did you sleeve the cycinder walls since B20 have week walls and hate boost?Third is this a full race car or a daily? Garret GT35R is a great turbo GT40 too. With your motor size it should spool up quickly