Full-Sac exhaust

[glider.]

Just a note here on the full-sac kit...

If you have an 07 or later bike, you must change the mufflers also when adding the full-sac exhaust because the left side muffler does not flow like the right side does. The left side is more of a sound can and has a baffle in the rear of the muffler about 6 inches in that will restrict the exhaust flow for the rear cylinder using the full-sac conversion.
Earlier HD mufflers or aftermarket mufflers can be used if they are the same construction for both mufflers.

Also see this tip...
True Dual Tip - Harley Davidson Community

 

[NEWHD74FAN]

Nice looking pipes, but regarding the reuse of the OEM mufflers all they say is use them, so this Self Help tip is a good reminder to be sure matched mufflers are used...

http://www.fullsac.com/true-dual-kits.html

 

[jimharvey1]

Nice looking pipes, but regarding the reuse of the OEM mufflers all they say is use them, so this Self Help tip is a good reminder to be sure matched mufflers are used...

http://www.fullsac.com/true-dual-kits.html

I dropped them a line asking that same question. This is the email I got back:

Hi Jim
The stock 07 mufflers are not the same left and right. No damage will occur if you were to use them but its not recomended.
Poor performance and even worse sound quality will be the result. If you want it as quiet as stock, use a set from a 05 or earlier.
They are interenally identical. I hope this info helps.
Steve George
Fullsac Performance
928-505-2912
www.fullsac.com