Source: Epic Level Handbook
Select an item creation feat. You can create magic items using that feat much more quickly than normal.
Prerequisite: Item creation feat to be selected, Knowledge (arcana) 24 ranks, Spellcraft 24 ranks
Benefit: Select an item creation feat. Creating a magic item using that feat requires one day per 10,000 gp of the item's market price, with a minimum of one day
Special: You can gain this feat multiple times. Its effects do not stack. Each time you take the feat, it applies to a different item creation feat.
Normal: Without this feat, creating a magic item requires one day for each 1,000 gp of the item's market price.