Metal scraping/rattling sound

[Solus]

My si coupe, is making some metal scraping/rattling noise under the vehicle close to the front passenger seat. On neutral, and a rev to 2k makes the scraping/metal noise, and on 1st, 2nd and 3rd makes the scraping noise. Reverse also makes the metal scraping noise. It sounds like im scraping my vehicle but there's nothing hanging low? Sometimes the noise is there and another time im driving it doesn't make any noise.

Parts I've got on so far with 7400 miles odo, on vehicle.
Prl cai street
Prl fmic with charge pipe
Prl catless downpipe/front
Hasport rear motor mount
Hondata w/TSP stage 1

Sponsored

 

[shoegazer]

pebble or small rock inside the brake rotor cover thingy, i believe.