Turbosmart BOV Kompact EM Plumb Back VR11 - BMW N55 M2 / X4 M40i Tomei Japan Please note:

Please note:

1990-1995    525i   M50 (Non-VANOS)

giving you more precision over boost management than ever before

Featuring a full solid-state design

most knock sensors were designed to generate an output voltage only around a preset frequency based on engine characteristics

Turbosmart BOV Kompact EM Plumb Back VR11 - BMW N55 M2 / X4 M40i Tomei Japan Please note:The Multiple Award winning Kompact EM Series of Upgraded Diverter Valves are the world's first truly plug and play Upgrade solution for your factory diverter valve. Unplug and unbolt your OEM Valve, and install a Kompact EM Valve. No adaptors, hoses or extra assembly is required.