I feel the DC header helped my F22b1 after I had AEM CAI and full catback installed. It seemed to pull harder from around 4,500 to redline.
I'd like to see someone dyno test a 94-97 stock v. DC header so we can put this nonsense to rest. Just because it doesn't make as much power gain as an lx/dz doesn't mean it's not worth it. You can look at a H22, B18C, and B16A header and say those are good too, but it proven that aftermarket ones can add a noticeable amount of power.