Dustin Walsh - Billionaire investor Carl Icahn is extending his offer to gain total control over Southfield-based Federal-Mogul Holdings Corp. as competition to control the supplier heats up. Icahn, through a subsidiary of his firm Icahn Enterprises LP, entered into a definitive agreement in September with Federal-Mogul to acquire the remaining shares the firm does not own âapproximately 18 percent. Icahn offered to pay $9.25 per share in an all-cash deal, which represents 86 percent higher than the