Hi to all of you!

Recently I bought 2019 Fat Bob 107. I have bike for few months now and need to say that it runs great and I really enjoy riding it. The bike is stock just that the mufflers have been upgraded to Vance&Hines Hi-Ouputs. I enjoy the sound but thinking about to also change air cleaner (also with V&H air cleaner) and upgrade ECM with V&H Fuelpak...

Now may I ask does anybody has this setup and how is with the performance upgrade-do you get more HP and more torque in lower RPMs?
And does Hi-Output mufflers increase power or should for the proper stage 1 other exhaust be installed for example Big Radious or Big Shots? ...
Is there any difference at all or should I stick just with the Hi-Outputs save money and enjoy my ride...

Thanks for the answers and
Regards from Slovenia!

 

With just slip ons and a tune, the difference will probably be close to nothing, if anything… at least not what you will be able to feel.

Changing the whole exhaust system with a proper tune will change the bike, you may feel power in different parts of the RPM range than you did before

 

All I've done to mine is a Stage 1 being the extreme air filter and V@H slash cuts with TTI inserts with the SE HD tune I also added a couple of degrees timing globally and added 2% fuel globally , it seems to rev a little freer(not much) and holds on a little past where the stock bike ran out of puff , say a 3 or 4 hundred revs. It definitely runs cooler though.
I did these mods for when I go to bigger cubes and a cam .

 

pisses me off but these M8s don't like to breath and can't stand too much more flow. The Stage 1 did make a huge seat of the pants difference to me with just the HD high flow breather assy and HD tuner. (I would suggest PowerVison tuner from FuelMoto as their free tunes and free tech support is #1) Just keep reading up and you will get your answers as they are all here.
Ride Safe✌

 

You need a cam to get real world difference. Stock to stage 1 is just more noise. Stage 2 there’s power everywhere and doesn’t have the abrupt roll off of power after 4k rpm.