Hi guys. I have just a scoobyworld race box back box exhaust on my 05 2.0 sti.
As I'm aware the sti has a main cat in the down pipe then one in the centre section before the resonator pipe?
Just wondering if I take out the 2nd cat in the centre section and replace it with just a through pipe that it be mot friendly still and free up some bhp?
Did try searching but just kept seeing threads for wrx's
Thanks.