ATS 8hp9X Billet main shaft

The ATS Billet Main Shaft for the ZF 8HP90 and 8HP95 is built for high-performance and extreme-duty applications where factory components become a weak point. Precision-machined from premium alloy steel, each shaft is heat-treated and hardened to deliver exceptional strength, long-term durability, and superior resistance to torsional fatigue.

Engineered as a direct upgrade over the OEM shaft, our billet design features reinforced geometry to withstand increased power levels, hard launches, and aggressive street or race use.

Whether you’re building a high-horsepower street car or a dedicated race setup, this shaft delivers the reliability and confidence needed to push the limits of the ZF 8HP platform.