weird grinding noise after dp installation

happy 4th of july guys and gals!! :) hopefully some of you may chime in on this after celebrating your 4th





after installing my catless Ultimate Racing downpipe, it was fine for the first 3 days then my car started to making some kinda grinding (metal rubbing) noise from under the body. At first it was only audible when I was making sharp turn. Then within the same day, it rapidly worsen by being audible when making any turn. And the next day, I can hear the grinding noise simply from driving straight line over 5mph and the grinding noise is much louder when making turn. (when the grinding noise is loudest at turns, I can hear it coming from the mid/rear left of the car)



I know this is a very long shot but I'm hoping that someone here might've had some experience with this problem and can shed some light. I'm concerned to even drive the car now :(



I've checked the power steering reservoir and the fluid level was good. I went under the car to make sure there are not heat shield or anything that can rub against the down pipe. I know for a fact the the grinding noise is not from my fender and wheel rubbing.