Another Catalytic Converter question

Hi Jake, I think the Cobra mufflers are probably 31/2 inch. Removing the cat will allow more flow and does increase the sound a bit but not to sound you may want. I went with a full system and used 4 inch mufflers simply because the 103 and the 110 which I have is pumping out more air volume. There are a couple different set up out there that work quit well. By the way getting that cat out will reduce a lot of heat. My oil temp dropped after I removed mine. The cat is next to the oil sump and does heat it more. It also will reduce the heat to your feet and leg.

+1 what FLHTbiker mentioned above. I recommend a full system over cutting out the cat. That way if you need to go back to the stock cat (emissions, trade-in) you simply put the original pipes back on.

fullsac performance X header pipe, no cat, heat treated and perfect fit plus
has the X crossover where the cat was located.

You will reduce the heat and pick up some sound, how much is hard to tell,
Keep the stock header so if you sell it or trade it or the epa comes knocking you can put it back on the bike..

If you do it all you need a tuner, I'd opt for TTS Mastertune as if you get the X pipe
you can get the tune from fullsac, or, go powercommander and get the Fuel Moto header in SS which costs quite a bit more, and a map from Jamie at Fuel Moto

Or yes you can get a vance and hines system too LOL

Ah yes all good points and I should have mentioned that tuning will certainly be necessary after changing the pipes. Everyone has their favorite, I'vealways liked both the ThunderMax w/Autotune or Power Commander. The ThunderMax is pricey but is a complete replacement ECM. I like anything that both auto tunes and allows for manual settings.

Both Maddog and I opted for the V&H setup, excellent setup with all new Chrome heat shields. Save the originals in case you are forced by the socialist government to only have stock setup. Has the X pipe no cat work great.
If you want the expensive TTS you can use it with any system.

TTS has autotuning capability as well, no bolt in hardware
no add on parts, no replacing ECMs and having to carry a
spare original if you are under warranty and need ECM work..

Contact Steve at www.fullsac.com and chat with
him about the x header and your mufflers, if you buy the TTS Mastertune
from him then he'll provide the dyno tune for your bike with it and the header.

I did this and rant 3 or 4 TTS Auto tune sessions and there was nothing that
was in need of change the map was spot on, this will save you dyno tune money.

If you still have your stock slip ons he sells a rebaffle kit, thats the way I went on my 110, just drilled them out and installed the 2 inch baffles. Sounds great.

Tmax is nice but you still have to buy the auto tune module, and by the time you do that its well up there in the price range. It's neat, but you need to consider you now have someone elses ECM in your bike, and if you travel, getting it fixed should it become the problem will be an overnight affair getting a new ECM shipped in to Buttfart IA on a Saturday afternoon.

The TTS is a laptop software solution, they used to make the SERT for HD, so it's as simple as carrying a copy of your map and the software on a thumb drive and the dongle (key) to access the ECM. Advantage is no hardware to install or replace. It's plug and play.

The Power commander is a good way to go, if you get the header and PC 5 from fuelmoto.com, they will ship it with a map, much like fullsac, but you will have to
install a powercommander on the bike, so it's a third party add on hardware, but Jamie at fuelmoto is very good at getting you the right map, and thus, no dyno time.

the PC also has an autotune module but I wouldn't buy it until I rode it with the map from fuelmoto, it may just be spot on...

So does TTS

By the time you guys all get done beating your gums with TTS, TM or whatever our Harley SE tuners keep on rolling us down the road with zero problems.

smart move Jake