FORGE MOTORSPORTS. With the introduction of the VAG TSi Turbo Engine, we have developed a Patented Atmospheric Blow-Off adapter specifically designed to fit this application. Simple in execution, yet offering the desirable atmospheric blow-off valve sound, this product has been designed to be fully compatible with the Bosch engine management systems employed. This is not only a replacement for vehicles fitted with the OEM solenoid valve part number 06F 145 710 D, but will fit earlier applications of the 2.0 FSiT .