These have been a fantastic addition to my 2006. I got the car with no miles on it and a new body after the previous owner crashed it, and I had A LOT of suspension work to do. I originally went with urethane bushings for the new steering rack but somehow they were worse than the stock rubber.
These, though, these are the ticket. Best steering feel in any of my three MX-5's by miles. Just wanted to write this so NC owners know this will fit your car and is an absolute no-brainer in terms of handling upgrades.
If you have access to a lift this is a 20 minute install. No need to 'remove' the rack from the car. I did have to pull one power steering line, but refilling and bleeding the system took all of 5 minutes.