Hi. Dont know if this has been posted before and hope someone can shed some light on modifications to my stock 2 into 2 headers on a 2012 Fatbob.  My one has been gutted and I run it with SE mufflers.  In a couple of posts over the last little while I have seen photographs where the collector have headers opened up, gutted and a baffle put in seperating the two inlets to the collector.  The last one I saw ran from the front to almost the back and was drilled to allow some mixing between.

So for anyone who knows

Is this something I should have done?  Whats the reasoning for doing it? Whats the best practice for doing this?

Thanks Fred

The touring bikes have the catalytic converters in the merged downpipes ( AKA "Headers")

Softails and most Dynas have the cats in the stock OEM mufflers for the Australian market

Your bike would have had the catalytic converters in the mufflers ? Unless the Fatbob is different ?

Those video clips of cat removal you are describing are all on touring bikes , some "mixing" of the gasses in each downpipe is still good for torque

The "Dyna switchback" will have the cat in the 2:1 bit no doubt, but I have not worked on one of them as yet

You live and learn as they say . A mate of mine had one of the first Fatbobs, and it did have the cats in the mufflers I'm sure !

No wonder all the recent Fatbobs have V&H complete systems here in Perth then !

yea they just keep changing shit, by the weight of the stock mufflers you think they both had cats in them.

 i have cut & cleaned a set with good result's 

Still wanting to know if these baffles are really required or not. I am without the baffles at the moment and around 5300-5400 it get some bad missing going on. I have the limiter set to 6200 and its come off the dyno punching above its weight in all other areas. Any comments welcome. Thanks Fred

Your talking about a splitter in the area where it goes from 2 to 1 and back to 2 right ? Required No, may help/ well maybe but a bit of work to install and then re dyno tune to find out.

What did your dyno tuner offer as the cause of the missing?