seat leon cupra st300

Hi i got seat leon cupra st 300 gpf just wanted to know if you remove the back box and add resnator what will it sound like. I was thinking of getting someone to make exhaust system for me Right now it way to quite for me 1. Will drone alot. As the car has it cats, 2 small gpf filter and...

Hi guys! I've read through many of the threads here regarding this issue but I could not get the right answers (at least in my opinion) - if I missed a thread (I've been kind of desperate and tried to scurry through them) and this has been thoroughly discussed before with good solutions then...