“Holley's name is a reference to Holley Performance Products, Inc., a manufacturer of high-performance carburetors and fuel systems located in Bowling Green, KY.”

See more about the Holley Performance Parts inspired Holley Shiftwell character here : http://pixar.wikia.com/Holley_Shiftwell

“Holley's name is a reference to Holley Performance Products, Inc., a manufacturer of high–performance Carburetors and fuel systems located in Bowling Green, KY.”