Swedish company Ferrita customized four precision-symmetrical exhaust pipes for a 2003 Mercedes-Benz SLR McLaren supercar using Meltio's DED wire-laser metal 3D printing technology, reducing time and cost by 50%. Traditional customization requires custom molds, leading to long lead times and high costs, while Ferrita typically has only one week to occupy the customer's vehicle. The project faced multiple engineering constraints: the parts needed to perfectly match the original car's lines, the exhaust system space was extremely tight, and the components had to replace the original silencer weighing about 20 kg to achieve significant weight reduction. The workflow integrated scanning, CAD modeling, and several hours of plastic prototyping, with final parts printed in 316L stainless steel using Meltio's robotic cell (ABB robot with nine-laser head). 3D printing enabled optimal internal geometry that is difficult to achieve manually, effectively reducing back pressure.