Arrow 72157PD Stainless Steel Racing Collector for KTM 690 Enduro R/690 SMC R 19-24/Gas Gas ES 700 22-24Arrow Exhaust Headers KTM 690 Enduro R 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 last but not least, good