Not ALL of them have the Harley writing on them, but the ones without tend to cost a few dollars more. Personally, I don't want a bunch of crap written on my muffler, and I'm too lazy to go to the trouble to dumpster dive at Harley shops; so I paid a fairly high price on eBay for my Dyna muff so would magically appear on my porch (UPS).

From my research, the Dyna can be directly bolted on, with only a little bit of metal shim between the 1-5/8" O.D. header pipe, and the 1-3/4 I.D. muffler connection.

I've read that the sliding bracket is an easy bolt up, but there are a couple of issues to beware of: Seems there is a short 16" version that has a tendancy to exhaust onto the rear brake rod, and maybe the brake hub itself. I've read that the 19" isn't so bad to do that.

I'm thinking about trying mine without going to the muffler shop for a custom made adapter with a bit of kink in it. Then if I don't like the results, it's simple enough to ride it down to the local muffler shop and do a bit of rework. Might be nice having that Dyna muff a couple of inches farther back anyways. May make covering the ugly part with a chrome dress-up heat shield easier.

I'll be finding out soon, as it is next on my list of 'to do' on the old '87. Frankly, I don't look forward to exhaust work. Would have put it on today, but got into a big mess that the previous owner left the wiring in. Good part though, the Big Crank battery came in, so no more slow cranking and fear of getting stranded.

I noticed JCWhitney has several mufflers.  They have a couple turn-outs for ~$45.  Anybody try these or know anything about them?

Just got a set from ebay, Steve, can you post the specs you asked for from your muffler shop for the adapter?  I definitely want to use both holes and clear the brake lever.

Actually mine turned out to be more like a 7-8 degree bend.  Doing that enabled me to use both mounting holes on the muffler bracket.

I run a 150 main and a 52.5 pilot jet and mine purrs like a kitten and gets about 58 mpg.  Depending on your location/altitude, a 157 may be too rich.

Thanks for the tip 911Radioman. Just did a mock fit and it seems the rear mounting bolt might need some spacers between the bracket and the muff Or i could bend the bracket.  other than that this should be an fairly easy mod. I'll try 152.5 first and see what happens

gentlemen - here's a tip or 3 that may have been on the site ot not but I know about them because thumperclone advised me -

a) use hi temp Permatex sealant on both joints between muffler & connector & connector & header.

b) do not run bike or move around for 24 hours to give sealant time to really set.

c) use Harley clamps to eventually clamp the connectors, but in the meantime just put them on the connector & use regular car clamps to clamp down on the joints - they clamp tighter than the Harley ones that may break if overtightened. after 24 hours take off the car clamps & move the Harley clamps into position & clamp them down.

I did not have luck with a HD muffler from local HDstore ("most customers want their old ones when we upgrade") but did get very cheap used (about 11") long heatshield from local old school place that specializes in working on big twins.

just finished install followed advise about car clamp and sealer going to the bike shop for some jets. I did start up before doing sealer and was getting some smoke is that a lack of back pressure and being lean? just don't want to finish this up and find that i'm hurting my beast.