Adjustable Racing Dual Stage Electronic Turbo/Turbocharger Psi Boost Controller Kit/w Switch Universal Description Choose between high and low boost while driving. Great replacement for factory boost controllers. High and low boost settings are fully adjustable. iPR boost controller allows increasing boost approximately 210% over internal wastegate setting and 110% over external wastegate setting. An effective and simple way to control boost level and generate more power from your engine. Mechanical boost controller is a manual boost control system that utilizes a pneumatic regulating valve bearing to manipulate boost pressure levels. Specifics and Features: Made with High Quality Aluminum for Enhanced Strength and Durability Polished Anodized Finish Comes with Mounting Hardware and Toggle Switch Dual Stage Boost Adjustments for Low and High Boost One Way T-Valve Better Control for Boost Spikes than Manual Controllers Professional Installer is Highly Recommended (No Instruction Included) Includes: 1 x Electronic Boost Controller 1 x One Way T-Valve 1 x Toggle Switch Mounting Hardware / Hose Hardware as shown