The King Cadillac GMC Throwback 100 was a NASCAR K&N Pro Series East race that took place at Thompson Speedway Motorsports Park in Thompson, Connecticut.

The race adopted its "throwback" format in 2017.

[1] On June 4, 2019, NASCAR announced the cancellation of the 2019 event.

[2] Ricky Craven had the most triumphs of any driver, winning the event three times.

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