Ferrea valve springs for BMW S54 engines are designed to address three critical issues that can compromise high-performance engines: binding

High-Flow Compressor Housing: Optimized for airflow

and its contribution to the GT-R's impressive performance capabilities

Contact our engine build advisors to discuss your next build

The fuel rail is CNC machined from extruded 6063 aluminum and laser etched for a high quality surface finish

OS Giken SuperLock LSD, BMW E8X / E9X Non-M Lancer Evolution Ferrea valve springs for BMWThe OS Giken SuperLock LSD features their patented pressure ring design, delivering smooth, progressive locking. Distinguished by a spline through side gear construction, OS Giken's design allows for the fitment of more friction plates (up to 2x as many as competing versions). Key Features: All components undergo chemical heat treatment for maximum durability Constructed from a high grade steel alloy, ensuring exceptional strength Gears are raw forged