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The SBC-F2.5D-390XP generates a maximum of 390 Amps at normal driving speeds and 220 Amps at idle. The OEM alternators for this engine produce a maximum of 75 Amps depending on the vehicle. By upgrading to the 390XP alternator you are gaining at least 315 Amps.

 

  • Idle Output: 220 Amps
  • Max Output: 392 Amps
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