That's because the Screaming Eagle pipes are none too different then the stock mufflers anyway. I've heard people here say that about the HD mufflers. But buy an aftermarket set that breaths and you will certainly flow more air and need a tuner.

 

That's exactly what my research indicated.

The key is flow rates. In the case of the mufflers, less back pressure means a higher potential flow rate.


Bryon

 

I just put on some Rush 2.0 slip ons and did not have to modify anything, they sound good and I have no problems with them.

 

I put a set of Dyno Jackpot mufflers on my 09EGC and have put 3k on the bike since putting them on. I have had no trouble with heat or bike running to lean. But I have not changed the stock air cleaner. I felt that dyno jackpot muffers had enough backpressue to do fine with the stock ecm. So far nothing has turned blue, oil temps have been great, rode in upper 90 deg days (when first put them on). As far as MPG getting 46 solo and 41 with the wife on. When I pulled the plugs last week they are a nice dark tan and showed no signs of running extra lean.

 

My V&H Monster Ovals just got delivered this morning to my house and look at this label on the outside of the box.
Sure, V&H sells the Fuel Pak but this looks like a legit warning label to me.

I may wait until I have the rest of the stuff from Fuel Moto before I put my new mufflers on. I'd hate to blue these up.

 

I just put the performance package from FUELMOTO on my 08 Ultra about 10 days ago
and could not be happier. It was the easiest Stage 1 upgrade I've ever done. The
hardest part was getting the original mufflers off, everthing else went great.

The Jackpot mufflers have a nice low rumble at idle and while crusing, and an attention
getting growl when throttling on. The Power Commander was strictly plug & play and
the programing appears to be right on. No popping, cracking, or hesitations just a very
smooth and linear throttle. And a very noticable increase in low end torque which
reduces the shifting between 5 & 6 at 60 mph. The only improvement I would've made
on the package would be chroming the air cleaner backing plate.

Jammie let me know if you come up with a chrome backing plate!

 

I believe the backing plate is a genuine HD product so check the HD accessory site to see if a chrome version exists. It may! (Assuming you bought the Fuel Moto A/C)

 

Having installed many exhaust systems both full systems and slip on systems the answer is it depends on the particular bike. Of course Harley is going to tell you you NEED the download thats available. Its just like V&H telling you that you NEED the Fuelpak. Don't get me wrong the Fuelpak is a GREAT product and I highly recommend it over Powercommanders and other fuel systems but......Best advice from somone who has their motorcycle tech cert. install the system and judge for yourself...You may discover you need a fuel management system then again you may not. RIDE FAST TAKE CHANCES!!!

 

I have a set of Screaming Eagle slip ons from my 06 Road King, the ones before the epa came down on them and put them on my 09 Ultra and had nothing else sone to it and they sound great and have no problems with airflow or back pressure, but the newer Screaming Eagles they have now are not worth the chrome they are made out of. Try Rush 1.75 or 2.0's they sound good and deep with a nice rumble

 

Put Rush 1.75's on and had my dealer say that the bike would be just fine without any reflash or download. Remember, the dealer who sold me the bike said this, so on matters where the dealer isn't trying to take my hard earned money, I'm listening.