Black94Z28

iTrader: (12)

Need to replace mine, autozone has both, the rubber is $10 more but i've always ran cork ones on other cars, are the rubber ones better?

JP95ZM6

My Felpro rubber ones have been used a half dozen times and don't leak a bit. They don't take a set, so I vote rubber.

irbs

iTrader: (7)

Fel Pro here and they are great.

96capricemgr

iTrader: (1)

I have never bought valve cover gaskets for my LT1s, just keep reusing the stockers. If you damaged one then I would stay rubber like stock.

fordeater

iTrader: (5)

Rubber for the win

Black94Z28

iTrader: (12)

Well i think thats were my major leak is coming from *hopefully* The gaskets looked fine, but it was wet on the passenger side block under the valve covers

Z28_DAD

iTrader: (18)

cork is for old school people. rubber is in and its cool

Black94Z28

iTrader: (12)

i'll be sure to use a rubber...or will i?

Pampered-Z

Rubber. I have aftermarket valve covers, the cork was just enough thicker then rubber that they caused the alternater to hit the VC. If that matters to anyone?

onephatZ28

iTrader: (8)

bowtie350_428

Screw the rubber. Get her on the pill.

But seriously I like rubber better the cork. They are reusable and dont get a crease like cork.

Formula350

iTrader: (3)

I'm pretty sure they don't even MAKE cork for the center bolt covers. Even if they do, RUBBER!!!

Boodyrider

iTrader: (2)

Rubber, and if they leak, the gasket may have moved slightly. I glue mine to the valve cover lightly with gorilla snot or similar (not silicone). I also found that my tired old valve covers needed a little bit more torque to keep sealed.

Also be aware if the PCV system fails, or you have significant blowby from worn rings, the crankcase pressure can easily blow out gaskets.

Black94Z28

iTrader: (12)

I wonder if this is the case, i took the pvc line from the valve cover and replaced it with a breather...could this have caused it?