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- This 2.57" pulley is a very popular upgrade for owners of new Mustangs equipped with Roush superchargers who wish to add more boost.
- The pulley is CNC-machined from high-grade steel for precision fit and extreme durability, and the surface is black oxide-coated to prevent rust. The pulley is keyed and installs as a direct replacement for the original Roush supercharger pulley.
- This will not fit the 2009 Roush Supercharger
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