BMW Mini CAT back system suitable for One and Cooper (2001 - 2006 models) - High quality T304 stainless steel aftermarket performance exhaust with lifetime guarantee. All Magnex systems offer excellent fit, exceptional build quality, a performance increase, great style and the ultimate in sound. Please note that those vehicles fitted with catalytic converters as standard should remove them for competiton / display use only. The vehicle will not pass an M.O.T without a catalytic converter. Learn More