Speed Pro [ R-9357 ] Moly ring set [std-340]

Do you have a prefferance for the Speed Pros? Looking for a set of 4 inch plus 40 overs will likely land you an easier find. AND the Speed Pros likely come in file to fit sizes, as in the part # R-9357 would more likely be R-9357 5. The 4.00 bore at 40 over then would be R-9343 45. The Hastings # 2M5508 at 40 OR 45 over would likely be real easy to find!