is it worth it to remove/delete the iab's on the gsr manifold. i'm running a chipped and tuned p28 so it wouldn't throw a code or anything. people were telling me that it would help out more on the top end due to the fact that the iab's aren't even working right now due to the p28. also i have another buddy that has a fully ported and polished gsr manifold, he took out the iab's and pretty much cut out the circle and square runners in the manifold. looks completely open when you look into it. it's also ported out to fit 68mm throttle bodies, he said that it flows better than a skunk2 pro series. i've tried to do some research on this and can't find anything about it anywhere, all the help would be appreciated, thanks sonazty.