Since designing the original BTB Procat 1, BTB has added 3 more versions of its successful 100 cell motorsport catalyst to the range. These all have received homologation from the FIA and now also appear in Liste 8 on the FIA website.www.fia.com/resources/documents/1640531507_List_08_Cata.pdf
www.btbexhausts.co.uk built by Racecar
