Happened twice in last few days, both after a turn with light acceleration. I heard what sounded like a loud engine knock. Let of gas gone, little gas again comes back. only lasted a second or two each time but it freaked me out. Sounded like it was on Passenger side near firewall. Kinda sounds like that rattle/knock at startup or bad spark knock but really loud. I got on it today and nothing. No engine light yet... Don't think it would be mechanical/major or it wouldn't have gone away?? I put plugs in about 1 1/2 months ago. Bad plug/injector maybe. Gonna go back to stock just in case I have unexpected dealer trip.... Not cool