Model: LEXUS GS300. Harmonic Balancer. LEXUS GS300 06 (3GRFSE engine). LEXUS IS250 06-15 (4GRFSE engine). Part Grade Abbreviations. cc = Credit Card size units. C = Greater than 200k miles. B = Greater than 60k miles and less than or equal to 200k miles but greater than 15k miles per year.
