Best sealing valve cover gaskets

I always had leaks no matter what I tried until I went with Superformance gaskets and followed their directions to the letter.

I now only use an inch pound torque wrench to finish tightening them to 50 inch lbs, and realize I was over-torqueing them when hand tightening them for years.

I had the valve covers off to run the valve clearance again 3rd time, and reinstalled them, torqued them and again no leaks with same gaskets.