Coming 3/11/13 is the new Mufflex Resonance Cancellation Pipe Kit.
Mufflex Resonance Cancellation Kit fits 2009 to Present Dodge Ram 1500 Mufflex 4.7 & 5.7 Hemi Muffler /Exhaust. This is a do it yourself kit for the 2009 to Present Dodge 1500 4.7 & 5.7 Hemi truck made from 409 stainless steel. This resonance cancellation pipe does not effect exhaust flow, sound or power just eliminates in cab resonance. Installation will require a small section of factory pipe being removed before your Mufflex Retrofit Kit. Installs in approx. 45 min with typical tools you have at home.
This design works using the Helmholtz Resonance System.
Helmholtz resonance finds application in internal combustion engines (see airbox), subwoofers and acoustics. Intake systems have been described as 'Helmholtz Systems' have been used in the Chrysler V10 engine built for both the Dodge Viper and the Ram pickup truck, and several of the Buell tube-frame series of motorcycles.