My OEM Lexus battery died without notice so I installed an Interstate MTP-27F. Fortunately the tire store down the street had one in stock. I called Costco first and they said they don't carry a 27F and are unable to order one. I thought that was strange.
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When I called Costco last year for a 27F, IIRC they told me for my car (98-02) I need a 24F. They also said they don't carry and cannot order the 27F.