don't believe you need to rejet the carb.never did and I cut my baffles on my wideglide when I cut the baffles in my drag pipes. definately sounded better. used to remove them & rev the motor just outta the garage to wake my next door neighbor up at 8:00am on sunday morns.ole charlie would come rolling out looking all hung over,bulging eyes feeling terrible trying to yell over the pipes. was hilarious!!:roll::roll: