The Competition package for the Audi S4 B5 consists of the intercooler upgrade kit and the downpipe kit. Intercooler Upgrade Kit 200001006 The WAGNERTUNING Audi B5 S4 Intercooler Kit is a high performance redesign of the original Audi OEM intercooler designed specifically for the B5 enthusiasts. Our engineers have increased the intercooler core and improved the end tank design to remove any OEM bottlenecks, resulting in increased flow rating and charge cooling properties. Updated to the latest tube fin technology for the intercooler core, combined with cast aluminum and then CNC endtanks for reliable high performance air to air charge cooling.OEM+ fit and finish for easy installation. The WAGNERTUNING Audi S4 / RS4 B5 Intercooler Kit features: latest tube fin technology intercooler cores 220mm x 215mm x 90 mm vs. OEM 160x215x65mm Calculated Flow Comparison: – WAGNERTUNING Intercooler 4257 ccm – OEM S4 Intercooler 2236 ccm – OEM RS4 Intercooler 2538 ccm – CAD optimized End tank design – Ultra-Light Weight Carbon Fibre intercooler air ducting – OEM installation points – 38% more cooling area than OEM – 90% greater flow volume than OEM – Stealth Flat Black finish Downpipe Kit 500001001 The Wagner Tuning Downpipe kit for RS4/S4/A6 2,7T is designed as a high performance, direct factory replacement downpipe kit. Engineered using the latest CAD design and flow technology, and constructed using top quality materials to our exacting standards, the Wagner Tuning RS4 Downpipe kit provides maximum performance and longevity. The RS4/S4/A6 2,7T Downpipe Kit features: 76 mm diameter tubing SS304 Stainless Steel Construction Eliminates power robbing Pre Catalytic converters 100cpi Racing Main Catalytic converters RS4 & RS6 Turbo Double Flange Note:- These will require linkpipes fabricating to fit S4 and rear lambda cables extending (if fitted)