First one was the stock 2 into 1 into 2 headers with the Samson 32" slip on
mufflers, no baffles, but one bolt through the pipe and then 3" diameter
with muffler packing around the sides.

http://www.youtube.com/watch?v=5BNh3F_eWCA

Second video is my true dual headers 2 into 2 with the same 32" fishtail
mufflers
http://www.youtube.com/watch?v=lnZLztCc1Y8

I didn't bother making a video of the true duals with straight 33"
fishtails....it was horrible.
I mounted 4" baffles mid way where the slip ons meet the headers...it's much
better now, but still very loud. I might need 10" baffles like they
recommended to me.
http://www.youtube.com/watch?v=cIyu_mkHyO8

 

Hey guys, I have a 07 Softail and I just put Vanes & Hines Short Shots on it Monday. Will the bike be ok if I do a STAGE 1 download and a High flow Air Filter!? Or is there truth to the dealer speal of 3 hours of dyno time and adjusting the parameters. A hd mechanic told me they are just trying to screw me and do the STAGE 1 & filter and it'll be cool!

 

http://s239.photobucket.com/albums/f...WESTTRIP08.flv

Clip doesnt do them justice.Have them on my rkc w/cfr duals.Never heard anything better,atleast to me.

 

Love that bike man... i'll try to post some soon!

 

My Bob with 2 1/2" OD Cycle Shacks


http://www.youtube.com/watch?v=2QC2qzW7NEA

 

Is any one here on this thread familiar with original mufflers modified by the American custom ??

 

this is a pritty old vid, this is when i had first made these pipes, i have modded them very slightly sinse then but the bike looks very different. pipes pritty much sound the same

 

My bike is a '07 Dyna Street Bob.

I'm a mechanical engineer in Italy and we work for many car racing teams. Ferrari, Lamborghini, BMW and many other super sport or racing cars. Look at the site: http://www.lamarmitta.it

I've projected this stock exhaust mod with a 3 stage baffle.
There's everything inside, high pitch noise cut, noise reducer, wall for back pressure.

Here some pictures of the same done on a '04 XL1200C: http://www.lamarmitta.it/component/o...,11/catid,213/

The exhaust has been studied with a 2:1 ratio between the center pipe area and the holes area the gas has to pass thru to walk around the wall. It means when the gas in the 1,3/4" diameter holed pipe, find a wall for back pressure, they have double the area to pass into another chamber.
This is an important rule to have a big twin's exhaust baffle that flows and performs like a direct flow racing baffle used on sport bikes.

Great power gain, not abnoxious sound. Deep thundering, throaty.

Listen with a good speakers the audio in this video, it's not an artifact of the microphone used to record, there's a bit of distortion but they really sound so deep and thundering, near the bike or driving it you can feel with your body the deepness of the low frequences produced by the pipes. The same deepness of the bigger cans of a touring bike, made by two tapered pipes of a Dyna:

[youtube]xlRdUQTKJ1Y[/youtube]

 

Rick----that sounds sweet Im not patient, anyone have a sound clip of Monster Ovals. I still like Ricks set -up. Is it really necessary for headers or can I just stay with slip ons.

 

Monster Ovals are tourer's pipes. Bigger cans, bigger rooms for exhausts, it's not dificult to obtain deep sound.

I've obtained with two stock Dyna's mufflers...