Beware, S9B has long gears, longer than S4C and will make the car slower. S4C is the B16A(2) gearbox, which was also available with LSD on the EK9 as Pete said. The S80 is from the DC2, the 98 JDM spec and I believe EUDM models having shorter 4th and 5th due to 1 inch bigger wheels than JDM 96 spec. So 98 spec boxes make for a slightly quicker car than 96 spec boxes.