Best Resonator to Remove Drone but Keep Sound? Or a Valve Solution? | 2015+ S550 Mustang Forum (GT, EcoBoost, GT350, GT500, Bullitt, Mach 1) - Mustang6G.com
The cure for drone-- 1/4 resonance pipes aka J-pipes aka Helmholtz tubes - LS1TECH - Camaro and Firebird Forum Discussion
some new ideas to reduce exhaust drone - 6SpeedOnline - Porsche Forum and Luxury Car Resource
Exhaust Drone Damper Weights? Anybody? | Fiesta ST Forum
Helmoltz resonator for drone - Exhaust - The Classic Zcar Club