Good afternoon everyone! I've been hunting around for a while and I can't seem to find an answer to my question. If anyone has any insight, advice or help, anything will be greatly appreciated! I'm trying to figure out the center bore size on an F50 and an F40. Are they the same? And, in that same train of thought: does anyone know what the stock offsets are for F50 and F40? Any help will be greatly appreciated. Thank you!