Popping sound from exhaust, 2013 3. 5 eco
 

So, I'm not to tech savvy so trying to get possibilities. I know it's hard without a sound clip I'll try and throw one on tomorrow. But it's been japping for a few weeks now under heavy, acceleration it's a varried popping. It definitely sound like it's out the exhaust.I have a 3inch mbrp cat back. Everything else is stock. Ran sea foam, still no avail, don't really wana go to dealer, could it just be spark plugs? Has 73000, bought used at 69500.