It was a custom install. The pipes are almost siamesed somewhere under the trans, before branching over to the mufflers on either side of the car. I gave them the photo of the bare 1960 Chassis that is in the Imperial 1955-63 Photobook, showing the layout of a dual system, and they winged it from there. Did a beautiful job. I think the pipes are the same size as used for a single system. My car definitely "breathes" better now. Chris H. --- mjusten@xxxxxxxxxxx wrote: > chris > > that must have been a custom install. did the 2 > exhaust pipes go thru the crossover hump? how did > you do that? were they 2.25" o/d? > > marty > > 66 crown 2 dr > > > -------------- Original message -------------- > > > Resonators are mufflers. > > > > On '64-'66 sedans and coupes there is a front > muffler > > under the back seat and and long rear resonator > under > > the trunk. Convertibles have a dual exhaust with > very > > short, flat resonators under the front seat and > longer > > mufflers under that back seat. (Dual system > necessary > > because massive "X" member added to convertible > frame > > does not allow for a crossover pipe needed for a > > single system.) > > > > Although Imperials switched from a dual system to > a > > single in 1962, I put a dual system on my 66 > LeBaron > > with two front mufflers and two rear resonators. > Car > > is now whisper quiet and seemed to pick up a few > HP in > > the process over the single system. > > > > Chris H. > > > > 66 LeBaron > > > > > > > > --- David Whitney wrote: > > > > > The parts book calls both of them "mufflers", > and > > > they look like mufflers > > > to me. I looked under my '66 Coupe barn find, > and > > > there's a pair of > > > mufflers under there. In addition, the line > drawing > > > in the FSM clearly > > > shows mufflers. I think what the factory was > trying > > > to tell us is when the > > > exhaust is done correctly you don't need > resonators. > > > If it's too loud, > > > something is wrong -- usually leaks or rigid > hangers > > > transmitting vibration > > > to the frame/body. Then the space behind your > > > fender panels resonates like > > > a kettle drum. I suppose in theory you could say > > > > the second muffler is > > > functioning as a resonator, but a muffler by any > > > > other name smells as sweet > > > when it's behind a 440. > > > > > > Are you saying it's loud inside the car or > outside? > > > Have someone drive > > > your car at wide open throttle while you stand > on > > > the side of the road and > > > see if you perceive it as loud. > > > > > > -- David > > > > > > > > > > > > > > > > > > Kenyon Wills > > > > > > > > > > > To: mailing-list@xxxxxxxxxxxxxxxx > > > > > > om> > > > cc: > > > > > > Sent by: > > > Subject: Re: IML: Exhaust for 66 > > > > > > mailing-list-owner@imper > > > > > > > > > ialclub.com > > > > > > > > > > > > > > > > > > > > > > > > > > > 03/31/2005 07:37 PM > > > > > > > > > Please respond to > > > > > > > > > mailing-list > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > first one is a muffler, second a resonator, > right? > > > > > > ALso, if you're redoing your exhaust, you should > > > > print > > > this out and take to the exhaust place to avoid > the > > > free-form art that they sometimes practice with > > > disasterous results: > > > > > > > > > http://imperialclub.com/Repair/Exhaust/ExhaustBendingDirections/index.htm > > > > > > > > > > -Kenyon > > > > > > > > > > > > ====================================================== > > > > > The factory manual and the part pages on the > club > > > > web site do not show > > > > resonators. Rather, there are two mufflers per > > > > pipe > > > > (single and dual > > > > exhaust both). > > > > > > Kenyon Wills > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > ----------------- http://www.imperialclub.com > > > ----------------- > > > This message was sent to you by the Imperial > Mailing > > > List. Please > > > reply to mailing-list@xxxxxxxxxxxxxxxx and your > > > response will be > > > shared with everyone. Private messages (and > > > attachments) for the > > > Administrators should be sent to > > > webmaster@xxxxxxxxxxxxxxxx > === message truncated === __________________________________ Yahoo! Messenger Show us what our next emoticon should look like. Join the fun. http://www.advision.webevents.yahoo.com/emoticontest ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm