[piecesparts]

Over the years, I have used the T/stat housings that required gaskets and I had a lot of corrosion (Pitting) issues on my aluminum manifolds, due to them being made from a variety of trash metals. I now use billet T/stat housings that have O-rings in them and I have not had any leakage or corrosion issues. since everything is now aluminum, the bimetallic issue is not there. The O-rings work well and can be replaced if needed. If you are using an aluminum intake, then i would suggest a good billet housing. Then again if you are still using the factory intake, then a good gasket with the O-ring built into it works great. Felpro offers them to the parts outlets.