The 13978 is a 12v 150 amp alternator, a new aftermarket direct replacement engineered to match the fit, form, and function of the original alternator. Specifications: - Voltage: 12V - Output: 150 amp - Rotation: Clockwise (CW) Vehicle Compatibility: - Makes: Ford, Lincoln (2003-2006) - Models include: Ford Thunderbird; Lincoln LS - Confirm exact fitment with your year, make, and model before ordering. Cross-Reference / Interchange Numbers: - Replaces / compatible with: 104210-3200, 104210-3201, 104210-3202, 104210-4150, 104210-4910, 13-9451, 13978, 210-1062, 213-9451, 334-1500 (plus 16 more on file). Why ePartsGlobal: specialist in heavy-duty starters, alternators, and charging-system electrical parts. Backed by a 1-year warranty, free shipping on orders over $19.95, and fast fulfillment. Ships from USA.