How do I fix a cracked exhaust manifold on my 6 cylinder 225 engine?

BRAND NEW. 125 bucks free shippin. Bigger enforcing ribs than the original. Thicker castin than the original. You can SEE it's thicker. I don't care if it's flaming homo chinkesium. It's gotta be better than a busted one.

[ame="http://www.ebay.com/itm/225-3-7-DODGE-CHRYSLER-PLYMOUTH-NEW-EXHAUST-MANIFOLD-/271387091294?pt=Motors_Car_Truck_Parts_Accessories&hash=item3f2fee615e&vxp=mtr"]225 3 7 Dodge Chrysler Plymouth New Exhaust Manifold | eBay[/ame]