Below is information direct from Germany regarding this product.
It may show additional information about fitment and specification.
New release 4. quarter 2018
Downpipe Kit with 300CPSI Racing catalyst converter for Subaru WRX STI 2007-2018
made out of high quality stainless steel 1.4301 (SS304)
complete Ã˜ 76mm (3)
high quality 200CPSI Euro6 standard racing metal catalyst converter
100% perfect fit, plug and play
less thermal load on the turbocharger
more power by reducing back pressure
significantly more torque
optional with Ã˜76mm (3) decat-pipe