ffs what is this sound under my car? Happens only at low RPM, in fact it happens exactly at 1,200 RPM as I'm decelerating. Started happening right after I changed my clutch. No idea. I have test pipes, no cats and oil level is good so wtf? It's super loud the whole neighbourhood can hear it... I'm probably gonna take it to an exhaust shop.

 

Sounds like flywheel chatter maybe? Did you use a lightened flywheel when you replaced the clutch?

 

Flywheel is OEM, clutch is aftermarket =/