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
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