The piece on the left, i guess, has been catching the wind and snapped the zip tie. Which explains the annoying scraping noise for the past week
Stopped by home depot and bought a piece of aluminum sheet metal. Attached it to the front piece so now the air should flow smoothly in that section. And since its aluminum, heat from the exhaust pipe shouldn't be a problem.
Now Im tempted to cover the entire exhaust with aluminum sheet metal
Also lined the edges near the exhaust with foil tape.
