brother, sorry to say that this LSD can't suit Y1 tranny...its just can fix to Y21, EK9, B18C and B18C R tranny only. 9 all big V only ). no matter cable or hydraulics type....
Time to sort out the rear diff i have decided to put an lsd in the rear..stock evo rs is the best i think .. looks like it will go in but will let you guys know how i get on but information is hard to find seems like...