I think it is likely that there is a higher metal content in the metal masters than the OEM pads. I have read other member's comments on the metal masters and there seem to be those that are satisifed with the metal master pads and their performance. Is there any noise with the metal masters, or are they as quiet as the OEM pads? I have also read plenty of praise for porterfield pads, I may decide tp give them a try next time it is time for a brake job, but we'll see.
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record