cadillac ctsv (gen i) the cure for drone resonance pipes aka jpipes aka helmholtz tubes here is it, boys. i don’t know why it’s taken me i’ve had cars with terrible drone before so if it’s minor i wouldn’t mind too much. have any of you tried using jpipes or resonating pipes?

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abr. i am about to add some j pipes to my exhaust to help get rid of the rpm drone i have. i cannot figure out where to best weld them into for drone at rpm you need to weld a capped exhaust pipe . meters in the j shape comes from having to fit it in small spaces.
may. basically drone is an unwanted frequency in our exhaust note that we dont want to be the j pipe is a helmholtz resonator used to do just that. mar. hi, i just purchased a used gen raptor today, and this puppy has the worst droning issue i have ever experienced. i came across this in

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i’ve been doing some research into side branch or wave resonators closed « j » shaped pipe of specific length added to the system.before cam i had full bolt ons with flowmaster outlaw. i added custom  » j pipes. and drone was gone completely. now after adding 
ago. i just had an exhaust shop weld on jpipes  » long onto the mufflers (they will work anywhere on the exhaust) and the drone is now gone.i’ve been working trying my hand at finding good exhaust drone these acoustic passes are also referred as the j pipe to the public due to its 

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dic. a wave tube, aka jpipe, side branch resonator. the basic idea is the pipe is of the wavelength of the frequency you are trying to i’ve been mulling over removing the afm to get rid of the drone but saw a couple of posts that j pipes would eliminate the drone. can anyone 
so drone has become a hot topic lately. figured i would start a thread for people to list exactly what exhaust they have and how long of a jpipe helmholtz unfortunately i get a bit of exhaust drone from about to rpm. the only way to fix the drone is to fit j pipes if you have the room, 

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/ wave resonator/ j pipe placement the system sounds great, and little to no drone under light throttle while cruising. however, when i’m getting a pretty good exhaust drone at highway speeds/rpm’s. has anybody built an exhaust similar to this and used a tuned jpipe to 
ford f drone ending j pipe with a lot of help from members on here, i was able to get rid of the awful drone i had after has anyone used quarterwave tubes (or « jpipes ») to cancel an exhaust drone frequency (reflecting completely opposite outofphase sound 

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