The stock 7.3 thermostat housings are notorious for leaking coolant. They are made from a thin press formed sheet metal that rusts, pits, and gets deformed by the bolts. To fix the issue we have machined a new piece from 6061 aluminum. This lets us build in a nice thick flange that will not flex or bend and also is much less susceptible to corrosion than steel.
Made in Tennessee, USA
-Machined from 6061 billet for maximum strength -Greater corrosion resistance as well as great looks -Thicker O-ring for even better seal -New stainless bolts and washers for an excellent finished look -Made in USA