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24SI and 28SI Alternator Core Identification

Use this page to help identify the correct core group for your core returns.  If you know the part number, please visit our e-catalog for model family idenfication.

24SI Alternator Core


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24SI regulator is flat.

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24SI casting fins are attached (pad mount only).

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24SI pad mounts are round.

28SI Alternator Core


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28SI regular has fins.

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28SI casting fins are short (pad mount only).

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28SI pad mounts are square.