I have not had a chance to take out the spark plugs to see if there's any oil inside the spark plug tubes. there doesn't seem to be any oil leaking from around the sides. The car is running good so as far as I can tell, they're holding up pretty well.

Thanks for the update ​@@arockbr3925

Yes I did use the ones provided that came with the kit. I haven't had any problems out of yet. Not one leak. The OEM valve covers that I use to get. Didn't last that long for me.

Yes, I did get my car tuned for the cams and all my other modifications after they were installed. I do love the idle of my car once it's warmed up.If you put cams on your car, they should work just fine with the stock block and a tune. But if you wanna rev the car to 7000 rpm, I would definitely get a rev up oil pump installed.I would not Rev the car pass 7000 rpm on stock rods.

Thanks, I think they do look very good in the engine Bay. These spark plug seals are serviceable. The baffle unbolts, and you can take out each spark plug seals and put new ones in. Then, just reinstall the baffle. You can not do that on the O.E.M valve covers.

@@arockbr3925 What is the source of these seals??? No one seems to know

@@arthurstember6572 I believe this is what you're referring to conceptzperformance.com/czp-replacement-spark-plug-tube-seal-for-czp-aluminum-valve-covers-vq35de-czp-13264-am600-rspts_p_75266.php

I will be keeping an eye on them as far as their integrity and longevity. The last factory valve covers I had didn't last too long. I don't know if I actually got a whole year out of them before they started leaking. So far, I haven't had any problems and no leaks with these aluminum valve covers. They've been holding up pretty well.