Part Notes: 6.8 Liter & 7.3 Liter, Dual Alternator, Primary;6.8 Liter & 7.3 Liter, Single Alternator, 250 Amp;F350 Super Duty; 6.8l; W/Dual Alternators; Primary; Extra Heavy Duty;F350 Super Duty; 6.8l; W/Dual Alternators; Primary; Standard;F350 Super Duty; 6.8l; W/O Dual Alternators; Extra, Extra Heavy Duty;F350 Super Duty; 7.3l; W/Dual Alternators; Primary; Extra Heavy Duty;F350 Super Duty; 7.3l; W/Dual Alternators; Primary; Standard;F350 Super Duty; 7.3l; W/O Dual Alternators; Extra, Extra Heavy Duty