I bought the 3 1/4" hone and it worked perfectly. The flex built into the hone has a lot of range. The 3" hone is slightly oversized, but I don`t know if it would be enough to get a good bite.I also used the 240 or so grit but really wished i`d have gotten something more aggressive .. I feel the extra oiling provided by a deeper cross hatch would have been OK. I drove my engine about 7500 miles after the ring job and it had excellent compression the entire time (3 checks during the time). Also worth noting that my replacement rings gap was barely within spec, possibly as little as .001" from being too large for Bentley to be happy ... i`m sure a rebore would have been better.