10% OFF SunCoast Performance Products • Use Code: BACKTOSCHOOL10
August 1–31, 2026 • Valid on SunCoast Performance products only.
This high-quality, high performance pressure regulator spring 77917-10 from Sonnax fits GM 4L60-E, 4L65-E and 4L70-E transmissions. The spring increases line pressure by approximately 13%, improving transmission performance in both standard and high performance applications.
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