im going to get a diff for 2wd sapphire but im not sure whats the best one to get, i only want it for the road and going up the strip a few times, but i dont know what one to get , theres 3.6 and 3.9 and ive heard of gripper ones and others but dont know whats the best one to get??


so any help would be great

forgot to say im running about 450 bhp