I did the helmholz style and that worked great. My drone was from 40-48 mph. Had a 2.94 gear so that made you stay in the drone zone longer. It was completely eliminated. But I would do the resonators if they did the same job. Cleaner look.
When I installed headers I removed the helmholz pipes also and I had no drone. Stock manifolds seemed to enhance the drone.
Thanks, I'm tempted to try the helmholtz style because I want to focus on the right frequency. The off-the-shelf resonators just seem to be a shot in the dark on what rpm range you can expect it to function at.
