4.7 exhaust studs source?

i went to summit racing and bought the stage 8 locking bolts. I threw the gaskets in the garbage and used the exhaust gasket maker from a caulking tube and have had no issues since.
http://www.stage8.com/

I replaced the studs with the factory studs twice and they broke out within a year. I have gone 2 years with the stage 8 bolts and no gasket with no issues