My understanding is they re-use your stock header pipe (de-catted) and your stock pipes (bored out w/new baffles). They offer several baffle and end cap choices so you can dial everything in to your liking.

I rode with a guy at Sturgis this year who had their complete set up with the Xied fuel module on a 2011 SESG and was impressed enough by his set up that I'd do it myself on my next new bike, his set up looked great and sounded awesome to me.

I can't understand how/why the big guys (D&D, V&H, Rinehart, etc) charge what they do these days....but if they can get it more power to them, it just won't be from me.

 

Huge advantage for American Custom is that they offer 3 levels of sound with the same OEM pipes.

You can change between stock sound, medium rumble and loud and proud in just a couple minutes with interchangable baffles.

Additional custom modifications can be made for each level by drilling additional holes, so everybody can get just the sound and power levels they desire.

You can set them really loud for kickin' around town, and then slip in some quiet baffles for those long road trips, where those loud pipes get to you after a couple hours on the road, or just to make Momma happy.

Since they use the OEM pipes, the bikes till look stock, and the cost savings are substantial.

 

They are loud like the Rhineharts, but deeper sounding, never put a meter to either one.

The mid range baffles are just like these except they have a flange so you can screw them in.

When I got mine the deep growl had no baffle. They are stock pipes, they are just modified so the chrome is the same as stock, because it is stock.

I wanted to experiment and new I would not know when to stop until it was too late so I bought a few sets of mid range baffles. I found it is better to enlarge the existing holes then add more large holes, or cut out the space between two hole for one large hole. Small holes cause an irritating tapping/popping sound.

 

Here's another thing you can do with them to get the max power out of them.

 

Drilled some larger holes in mine -- Very happy with them.

I think I did a big blog post on --- Yep.

http://www.johnscrip.com/html/blog_f...d_mufflers.php

Kind of a muffler diary -- Two bikes, a few different setups.

 

I have had mine for about 1-1/2 years now running the mid rumble baffle and they sound good but I do want more sound. Their bomber conversions are the factory pipes with the baffle cut out and a plate installed so that you can install one of two sets of their baffles. The bomber conversion is not worth the money. You can do the same thing by just removing the stock baffles. My bike ran like **** with their bomber mufflers. Loss of throttle response, loss of torque, decel popping, and loss of power. However it runs good with the mid rumble baffle but it could be better if I tuned the engine. I laugh when people say they look so good. It is a stock muffler and I like the way the stock muffler looks. The conversion does not change the look unless you purchase their end caps.

The conversion is $224.00 on your mufflers. The price is higher is you don’t use your mufflers. Then add another $49.00 for the end caps if you want them. Add another $44.00 for the mid rumble baffles. A total of $317.00 plus shipping both ways using your mufflers. The cut they make to install their plate was left rough and could easily cut you when cleaning the mufflers. A simple three minute job running a sanding drum around the cut would solve the problem before they weld in their plate. If I had to do it again I would do something else. I would try B & E Performance http://superflowmufflers.com/ Check out their Superflow mufflers. There are also several low cost option slip-on out there. Do some more looking.