my custom exhaust is droning between rpm and rpm. after doing research, i found a good solution which involves installing j pipes.the cure for drone resonance pipes aka jpipes aka helmholtz tubes the sound wave is then reflected back into the exhaust at wavelength, perfectly 
may. j pipe exhaust drone nasty. hi i’m new to the forum. posted this same thread over at nam but no one cares. it seems like most of those guys are i’ve been doing some research into side branch or wave resonators closed « j » shaped pipe of specific length added to the system.
exhaust drone is a problem i’ve been dealing with and most of the time people solve it by trying various mufflers, resonators, and sound 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 

exhaust drone j pipe
Visto en modbargains.com

exhaust drone j pipe
Visto en forums.corral.net

exhaust drone j pipe
Visto en ls1tech.com

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,  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 
jun. he told me the shop that did his cat back exhaust installed « jpipes » and else use « jpipes » or heard of using these to get rid of exhaust drone  jul. i running dtlt’s with stock ypipe and in catback with magnaflow muffler, and am dealing with the dreaded drone at low rpm. with a little 
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 ini’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 

exhaust drone j pipe
Visto en ls1tech.com

exhaust drone j pipe
Visto en f150forum.com

exhaust drone j pipe
Visto en rennlist.com

has anyone used quarterwave tubes (or « jpipes ») to cancel an exhaust drone frequency (reflecting completely opposite outofphase sound  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 
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 recently installed jpipes from solo performance on my v with flowmaster outlaws and an hpipe to reduce the drone (it is absolutely terrible at k forums technical subforums > v .l engine mods: boltons, exhaust, tuning 
the system sounds great, and little to no drone under light throttle while post muffler has the advantage of using smaller pipes, but would  how to build an exhaust resonator tube to eliminate drone simply put, it is a small piece of exhaust pipe with a flat capped end welded nearly . i know a similar style « j » shaped pipe is popular too, seems to be very effective!

exhaust drone j pipe
Visto en forum.miata.net

exhaust drone j pipe
Visto en grassrootsmotorsports.com

exhaust drone j pipe
Visto en rennlist.com

exhaust drone j pipe
Visto en s197forum.com

exhaust drone j pipe
Vota