Hi,

My exhaust is a custom welded job with H pipe and Dynomax Super Turbo mufflers. No drone with Eddy 750, stock heads and intake. Switched to Eddy Performer heads, CH4B intake, and Holley 770 Avenger. It was significant before carb change but even more noticeable after. Now pretty annoying drone at low to mid RPMs. Previously switched from some Hooker chambered mufflers to rid a drone. Any ideas?

Thanks, Pete