May not have been pinging

[Jesus]

A couple weeks ago I postd aboutmy car pinging. I replaced my FIPK with the stock air intake and that seemed to stop the pinging I thought I heard when I would pull away or shift slowly from one gear to the next. But, I am still hearing something when I get on it (around 5000-5500 rpm) I think what I am hearing is something in the exhaust system, possibly the cats. Is it possible the sound I am hearing is the cats? The sound I am hearing is sort of like sand or gravel in a paper cup, something blunt not pingy. It does not fluctuate with rpm either, meaning it does not get more drastic as the rpms increase.

thanks

 

[hotmustang331]

Well ine has a slight exhaust leak and the guy I raced earlier today said it sounded RASPY, but thats because its blowing out of the pipe and taking away the smooth sound.BUT ONLY UNDER WOT AT AROUND 4500+. Also was doing it before the chip so its NOT pinging. Bad thing is that it just started a few months ago, noticed it when at WOT next to a guard rail. i hate it, makes the car sound like crap.

 

[69fb00GT]

Possibly a heat shield around the cats rattling?