Need help identifying sound
I can not hear it when looking at the motor from the top, only when looking underneath. The sound is in rythem with rpms unstill it eventually is drowned out by the exhaust. Car drives fine, oil pressure is little under 40 at idle. Motor has 91k. Raced it saturday, went 1250s @ 107.
Could it be the headers vibrating on something? I wrapped header wrap around the Y pipe so I know its not that. Im open to any suggestions, lets hear them.

