I installed these on a 1998 Honda Civic HX. The shift action was very sloppy, largely because the 15-year-old rubber bushings were awful. Switching to these poly bushings is literally a night and day difference. Shifts are much crisper now and the notches are much more clearly defined. Installation was very easy, took maybe 30 minutes under the car. Most of that was just trying to press the bushings into place, because the included lube is closer to glue than grease. For the money and time involved, I can’t think of another upgrade that provides such an immediately noticeable improvement.