Hand made stainless steel exhaust systems for; . Classic Vehicles . High Performance Applications . Custom Fit . O.E Replacement All systems are fully TIG welded to ensure high durability and a product that is aesthetically pleasing. Exhausts are constructed from 316 grade stainless unless specified otherwise. Products. The normal day to day products that IWS manufactures are; Exhausts. Intercoolers and Intercooler Setups. Intake systems. Stainless and aluminium fabrication.