Valve covers are alum./powder coated black. purchased from
ATR. Will work on stock heads ,& gn1s. for sure. Welded baffles
inside to help combat the oil in the breather problems often
talked about in our forum. You will need mounting hardware and
gaskets.
To answer your questions,I run a oem set up as far as heat/ac.
The covers do not leak.(When installed properly).they were rock solid for me.The only reason i' m selling them is i
wanted to use the stock covers. So i bought some spacers and did
just that,and i dont plan on useing them again. I used k&n
breathers. These covers are in perfect condition. Just need a
new home. thanks and let me know if you can use them.