If you haven't seen this new header design, it differs from the traditional aftermarket 3-2-1 header tube orientation, having all primaries dump into one large collector. They claim that the cracking issue is resolved with this new style. I will definitely be putting this one through the crack test.... They are also saying that this ceramic coating will reduce radiant heat 50-60%. It's replacing an old Borla that has a 2-1/4" outlet diameter with fairly small collectors. The Borla has been cracked and re-welded at least 6 times and it sounds like it's cracked again lol. I guess its had a good life tho, pushing 140k since installing it used.. The Banks unit has a straight thru 2.5" Id outlet which should help the 4.6 breathe better. I did tig a 2.5" dia. stub flange onto the outlet so I could slip on a standard 2.5" donut style gasket. They claim some decent dyno gains with this header compared to their older design. Those tests were conducted on a stock 4.0. So the gains should be a bit more evident on any stroker motor.
Enjoy. 
