If you're talking about full length guide rods, I'd consider leaving whatever you have. There's no solid indication that they make the gun perform better or worse. I have 1911's with them, and without them. All the guns function like 1911's.

If your recoil spring doesn't roll anymore when you take it out or it leans to one side or the other, its kinked. Almost EVERY spring that has seen use that is taken out of a non FLGR gun has these kinks.Originally posted by 7th Fleet:
Those who advocate their use maintain that it keep the recoil spring from kinking, when the gun is in full recoil. I have never had a recoil sping to get kinked in guns without the FLGR, so much for that theory.