Fitment 1: For A3 1.4 1.8 2.0 TSI / for FSTi Turbo, For A3 2.0 Turbo, For A4 1.8 / 2.0 Fsi Turbo, For A6 2.0 Fsi Turbo, For S3 2.0 Turbo 8P / 8V, For TT Mk2 2.0 Turbo, For TT MK2 TTS 2.0 Turbo, For SEAT Altea 2.0 Turbo, For SEAT Leon 1.4 Turbo TSI 125, For SEAT Leon 1.8 TURBO TSI 160 PS (1p, MK2), For Scirocco R 2.0 Turbo. Fitment 1: For SEAT Leon 2.0 Turbo FSiT, For Octavia 1.4 TURBO 140, For Octavia 2.0 Turbo, For Beetle 2013 2.0 Petrol Turbo, For Golf MK5 1.4 TURBO 140, For Golf Mk5 GTI 2.0 Turbo, For Golf Mk5 GTI EDITION 30 ED30, For Golf Mk6 1.4 Turbo, For Golf Mk6 GTI ED35 2.0 Turbo, For Golf R MK6 2.0 Turb, For Passat 1.8 / 2.0 for Fsi Turbo. Function: Diameter: 19.5mm provides ideal atmospheric blow-off valve, improves the high performance of the turbine engine, increases the torque of the blow-off valve and extends the life of the turbine engine. Excellent performance: Improve turbine response, add extra air into the atmosphere instead of returning it to the engine, easy to install, but still recommend professional installation. CNC material: The Dump Valve Adapter is made of high-quality CNC blank aluminum, antioxidant, reliable in use, sturdy, wear-resistant, anti-collision, high strength, high hardness, long service life.