Arrow 71745MI Stainless Steel Racing Collectors for Husqvarna Svartpilen/Vitpilen 401 20-23Arrow Exhaust Headers Husqvarna Svartpilen 401 Vitpilen 401 Not all exhaust pipes are made equal, the Arrow Exhaust Header bears all of Arrows experience accumulated from world class racing. That experience has lead Arrows to fine tune each part of their design and manufacturing processes. Everything from pipes diameters, sections bends, components, welding and layout are carefully tested to produce a product with high performance, reliability and