September 29, 2021

See What's Inside the Sonnax 4L80-E Performance Pack

Presented by Sonnax

​​​​​​​​​​​​​​The most comprehensive transmission upgrade kit on the market for GM 4L80-E and 4L85-E units is part of Sonnax's popular Performance Pack product line. This video breaks down everything you get from this unique kit, which includes components to precisely recalibrate pressures and shift accumulation PLUS heavy duty parts to repair damage, prevent future wear and improve reliability. Top builds for maximizing work/sport vehicle performance and durability start here!

Learn More About Sonnax Performance Pack HP-4L80E-01

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