Topless Stang

I'm looking at replacing the T-Stat housing and components...

Has anyone looked at this kit before?
Kortekk (K-8592-BFA)
http://www.ebay.com/itm/2005-2010-Ford-Mustang-4-0L-Thermostat-Housing-Assembly-w-Sensor-and-Bypass-Hose-/181166309474?hash=item2a2e5a8062&vxp=mtr#vi-ilComp

07 Stang

Is it made of plastic? It's hard to tell in the photo.
Why not get the new alluminum thermostat housing?

The01Cav

I just installed the metal housing on monday with a 180* thermostat and a new coolant temp sensor. Install is pretty straight forward.