The Ferrea Valve Springs are designed specifically for BMW E60/E82/E91/E92 3.0L engines with a DOHC 24 valve setup (N54). These high-performance valve springs are manufactured by Ferrea, known for producing quality automotive parts. The Manufacturer Part Number S10158 indicates that these Valve Springs are a genuine product from Ferrea, making them a reliable choice for enhancing the performance of your vehicle. Perfect for racing enthusiasts or anyone looking to improve their engine's performance, these valve springs are a must-have component for auto parts collectors and enthusiasts.