BMW S54 Race Valve Spring Kit crown Whether you’re building a track-focused

Whether you’re building a track-focused S55 or a high-horsepower street car

100% All-Aluminum TIG-Welded Construction

engineered for optimal power generation with minimal lag

Part Number: SC7701

Whether you're building for high-revving street performance or all-out racing

BMW S54 Race Valve Spring Kit crown Whether you’re building a track-focused5150 AutoSport Pro Xtreme Valve Springs for BMW S54 Engines 5150 AutoSport Pro Xtreme Valve Springs, designed specifically for BMW S54 engines. Whether you're building a high performance street car, road race setup, or turbocharged application, these valve springs are engineered to deliver stable and reliable valve control up to 8500 RPM. Available as a complete kit including valve springs, seats, and steel retainers, or as springs only, allowing