STM Evo 7/8/9 GESi EPA Stainless High Flow Cat M&H a stainless filter element is

a stainless filter element is recommended

fuel tanks

G 055 529 BMW BMW DCTF-1

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STM Evo 7/8/9 GESi EPA Stainless High Flow Cat M&H a stainless filter element isThe STM stainless high flow cat for Evo 7 8 9 features a full stainless steel construction, tig welded in house at STM and utilizes the GESi GEN1 ultra high output EPA compliant catalytic converter. Bolts right in place of your stock cat and will fit most aftermarket exhausts that keep the stock location for the cat. Both O2 bungs are included as pictured for your factory o2 sensor and and a wideband if you run one, as well as the extra plug if you