STM Evo 7/8/9 GESi EPA Stainless High Flow Cat Electric Ceramic Disc 228mm High HP

Ceramic Disc 228mm High HP street or race

• TiAL MVR 44mm

If you vary the size of the piping around the GM MAF

The lower piece is machined from billet aluminum and designed to hold your shift boot up with its lower groove

STM Evo 7/8/9 GESi EPA Stainless High Flow Cat Electric Ceramic Disc 228mm High HPThe 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