Right-back Khulekani Shezi scored the decisive goal in the 53rd minute with a powerful effort that beat Brandon Petersen at his near post and silenced the home crowd.
Chiefs dominated large periods of the contest and created numerous opportunities, particularly in the first half. However, they lacked the clinical edge required in the final third, with several clear chances going begging. Nkosingiphile Ngcobo and Lebohang Maboe were among those who failed to convert promising openings.
Fernando Da Cruz’s side continued to press after the interval and introduced substitutes, including new signing Langelihle Phili, in an effort to force an equaliser. Despite sustained pressure and late opportunities for Thabiso Monyane and Mduduzi Shabalala, Arrows held firm to secure a famous victory.
The result ends Kaizer Chiefs’ hopes of early silverware this season and extends their wait for an MTN8 title to 12 years. Golden Arrows advance to the semi-finals, where they will face Mamelodi Sundowns.