BMW S58 Pro-Xtreme Valve & Valve Spring Kit

Simplify your next S58 engine build with this all-in-one Competition Valve & Spring Kit, now available from 5150 AutoSport. Featuring Ferrea's single groove stainless steel valves and a complete high-performance valve spring kit, this package eliminates the guesswork—giving engine builders a reliable, track-proven solution in a single click. Built for Power. Engineered for RPM. This kit includes standard-size Ferrea Competition Plus intake and exhaust valves (30.1mm intake / 28.5mm exhaust) made from aerospace-grade EV8-Z18 material. These single groove valves are ideal for high-lift camshafts and sustained high-RPM use. Ferrea’s two-step slow forging and 48-hour heat treatment process ensures exceptional strength, heat resistance, and fatigue life—even under extreme boost or racing conditions. Includes Valve Spring Locators – A Critical Upgrade Many Kits Leave Out Valve spring locators are essential for high-performance valvetrain stability. Locators keep the springs precisely centered on the cylinder head, preventing unwanted movement that can lead to harmonics, instability, or even failure at high RPM. By stabilizing the spring base, the locator helps maintain correct spring frequency and seat pressure, extending the life of both the spring and the cylinder head.  Included Components: 24 Ferrea Single Groove Valves 30.1mm intake / 28.5mm exhaust Avionics-grade chrome-plated stems Hardened tips for increased durability EV8-Z18 stainless for high temperature resistance Single Groove Valve Locks Ferrea Valve Spring Kit 24 premium chrome-silicon steel valve springs 24 lightweight titanium retainers 24 precision-fit valve spring seats Valve Locators Ferrea’s spring system is engineered to maintain valve control at high RPM, prevent float, and handle the increased load of aggressive cams and high boost. Lightweight titanium retainers reduce valvetrain mass and improve engine response, while the included spring seats ensure long-term reliability under high stress. Why Choose This Kit: One-click solution: No need to piece together components Ideal for high-RPM, high-lift camshaft builds Supports boosted, track, and motorsport applications Designed specifically for the BMW S58 engine Trusted Ferrea quality backed by decades of motorsports experience Recommended for professional builds, high-performance street use, or full-race applications. Installation Note: Professional installation by a qualified engine builder is strongly recommended to ensure optimal performance and reliability.