GAS Titanium Upper Charge Pipe Kit, B9/B9.5 Audi RS4/RS5 EA839Our titanium upper charge pipe kit replaces the flimsy plastic charge pipe in your 2. 9T RS4 RS5 with a solid, one piece titanium unit that guarantees reliability at any boost level. The EA839 2. 9T is a very strong engine, but due to cylinder head flow restrictions, high turbocharger pressure ratios are required to make power. Don't let charge pipe blow outs ruin your day! Fits both B9 (3 piece) and B9. 5 (one piece) charge pipe designs perfectly.