Vance & Hines Longshots with Quiet baffles

[AZCaveman]

If no other changes..Intake etc.  Then no, your stock computer will adapt just fine.
QUIET?   Yes fairly quiet, yet louder than stock as the goat bladder actually does a significant amount of quieting. and removal with raise sound.

[moto]

If I change my Drifter exhaust to V&H Longshots with Quiet baffles;

- do I must to buy Powercommander ?
- do I must to adjust fuel mixture ?
- are these pipes very loud with Quiet baffless installed

thanks