2006 Firebolt XB12R bought it with a slight crack in the front header. Anyway got worse. Trying to swap it out. Got the old one off, but the new one absolutely refuses to go back in. I've removed the o2 sensore and still nothing. I've even pulled the fan after jacking the back wheel up and taking out the rear shock. It's got plenty of room on the topside, I just can't get the bend towards the frame and the header facing the head. Help.. wtf am I missing here guys?

Thanks,