Audi Peace, mercy, and blessings of God be upon you. Fits Audi TT models from 1999 to 2006. For sale: Blow off valve. For turbo cars only. Its sound is amazing. 😏 It has an adjustment on top. Brand: Forgo Original, made in Britain. Turbo hose inlet underneath, 2.5cm (1 inch) width. Side turbo hose inlet, 2.5cm (1 inch) width. Used, clean. Comes with the complete set of parts.