I did this last night. It made a difference in the shifting, much smoother and easier. I didn't read the amazon listing, so the new packs of the Dorman 65277 only have 1 20mm washer, not 2, so I ran to the Honda dealership and got a Honda 94109-20000 washer. The Dorman is thinner and copper, the Honda is thicker and aluminum. They are both crush washers. I would say it made it 30-40% easier and smoother to shift. Cost about $10 and once my car was in the air took about 30 minutes because my cat was right in the way, so I had to drop the front of my exhaust to get my hand in there. I have V bands, so it was easy to do. The Corvette and Mustang crowd call it the anti venom mod.