This is a direct replacement for factory Bosch valves found in Volkswagen and Audi 1.8T and 2.0T turbo vehicles. It is designed to maintain proper operation and fit seamlessly with the stock boost hoses. Made from CNC-machined 6061 aluminum, the valve features a precision piston and o-ring design for reliable, airtight operation. The valve is serviceable, allowing the top to be removed for greasing if needed. Available in a black finish with the Vivid Racing logo. Fitment: Audi: A3, A4, A6, S4, RS4, RS6 and other 1.8T/2.