just purchased a new 2012 Electra Glide Ultra; planning to add V&H Twin Slash Rounds slip on mufflers; hoping to NOT have to remap/dyno, etc. This is my first EFI bike, just traded an '06 Street Glide (last of the carb-equipped bikes). Have heard that the new EFI systems will adjust to the mufflers and later to a high flow air cleaner. Any thoughts or experiences will be appreciated. Thanks

 

Shouldnt have any issues with just slip ons. If you also do your AC then a download or tune will be required. I know a couple people that have the twin slash on there ultras and on a RGC with no additional mods on the there bikes run fine. No decel pop or any other issues.

Ride safe.

T

 

T- thanks, appreciate the input

 

We swapped out the way too quiet stock slip-ons for Reinharts the first week we got our bike. Knocking on wood, we have had no issues and love the sound. We had no popping on decel and mileage seems not to have changed.

 

If you are just doing the slip ons.... no worries.

BTW, you will love the twin slash rounds sound with the stock headpipe/cat. Not too loud but the nice Harley bark when you roll on the throttle.

 

I noticed a huge performance gain When I ditched my stock for the supertrapps, with nothing else done to the bike. Ran not only just fine but FAST (if I can use that word to describe an FLHTCU with a sport bike parked next to it). Then I installed a K&N A/C, not too noticeable, but still I didn't do anything else to the bike. Rode that for a week or two then got the Power Commander 5, gave Jamie my specs during the order, when it arrived I just installed it and have happily riding ever since. One of these day I may have it dyno'd/tuned but I see no pressing reason to as of now. The bike just runs.

 

Thanks to all; leaving the 3rd for WV, will be gone 9-10 days. Planning to put on V&H Monster Rounds when I return.

 

09 ultra classic wanted some slipons with no hassles my indy recomended Rush Big Louie slipons, great sound,got them with the 2'' baffles perfect,''no'' decel poping love them,always had vance&hines but these were cheap and very easy to put on! hope this helps!

 

Same mufflers I have with the stage 1 download, Air Cleaner, S& S true duals. Runs good a little louder than expected but they are ok.