Definitely. If you're outside of warranty when it happens, take them to a machine shop and have them grind it very lightly down to "perfectly flat", then bolt it back on using new studs. Once the mainfold has twisted, it will want to stay like that naturally, so if you can grind it down to flat it will never twist again.
If put new manifolds on, you're just going to get the same problem back at some point, sooner or later the bolts are going to snap for everybody.
Otherwise, guys are putting on shorty's or long tube headers to bypass the mopar junk completely. Slightly better performance and sound.