I want to get a pipe installed from my new axle back muffler as far forward as I can to delete the resonator and second cat without deleting the primary cat. I'm wondering what that bulging piece is with the weird mesh around it between the turbo and the second cat. Is it the primary cat or something after that? and can I delete it without messing with the ecu? I can't jack up the car to really see so help on this would be nice.