RJWC exhausts are hand built and assembled in Sweden. They are made of 304 Stainless steel, all billet parts CNC machined from 6061 Aluminium and precision TIG welded. All RJWC exhausts use ceramic wool packing, which doesn't disintegrate like the other industries exhaust systems. Each is exhaust is made from thick material in muffler cans and tubes to help distribute heat and stay durable. RJWC also offer the most performance gains of any exhausts out there, and giving your ride a deep, throaty tone.