Ferrea Spring Seat Locators are crafted from robust 4140 chromoly alloy

even with mild camshaft upgrades

This turbo kit is designed for the enthusiast by the enthusiast and includes everything needed to convert your twin turbo S58 into a single turbo

Main Harness: The TMS harness features plug-and-play connections for critical vehicle sensors

Garrett GTX3582R GEN II Turbocharger

BMW M40/M42/M44 Valve Spring Kit, Pro Xtreme Valve Size:7 mm Ferrea Spring Seat Locators are5150 AutoSport Pro Xtreme Valve Springs for BMW M40 M42 M44 Engines Maximize your engines potential with 5150 AutoSport Pro Xtreme Valve Springs, designed for BMW M40 M42 M44 Engines. Whether you're building for high revving street performance or all out racing, these valve springs are built to handle engine speeds of up to 11,000 RPM with confidence. Available in two kit optionsone for 6mm valves and one for 7mm valvesyou get the flexibility to match