Rhys, about £8 for the 1mm steel, about £15 for the Reno rubber seals, £30 for the pipercross 75mm air duct kit, £65 for the heat resistant foil (ouch but nesessary), £20 for paint, gas welder & brazing rods and a good few hours in the garage while the wife was busy watchin Emmerdale, Coronation St and East Enders!! oh and the obligatory cuts and burns during fabrication!