The Wagner Tuning Competition intercooler has the following core size (610mm x 440mm x 65mm), providing a 10% larger frontal area and 50% more volume compared to the original Audi S3 intercooler. Wagner-Tuning Competition Core with high cooling performance and light weight (9.3 kg). CAD optimized new cast aluminum end tanks and competition high speed core give this intercooler excellent cooling properties. Flow analyzes and simulations were created to optimize the design to achieve the best possible internal airflow. This intercooler is the best choice when it comes to performance gains and low intake temperatures. Much less pressure drop than OEM intercooler. Anti-corrosion protection coating with perfect thermal heat dissipation character. Optimal cooling with significantly more power. The kit is ready to install, 100% perfect fit. Fitment is easy, replacing the OEM intercooler. All of our products are subject to rigorous quality control. Including TÜV certificate. On both sides, the connection diameter is 67 mm.