I have a 2012 Road King and I am going to remove the stock rear shocks and install a new pair of progressive 412's. Since these new progressive's are not air ride, what do you do with the air lines that run to the current air ride shocks? Do I need to remove them, plug the line, etc?

 

Just take all that stuff off and sell it to somebody who has a Sportster. Those used shocks are a popular mod for them.

No need to keep any of the air lines or hardware on the bike.