Ok, these Superperformance gaskets are not Super. On a stock head with stealth heads, they leak. Anybody have the best gasket?

Never had any luck with Superformance gaskets. I use Moroso Blue 93055 gaskets. If you have aluminum heads and cast valve covers with flat flanges the cheap floppy Fel-pro rubber gaskets work great.

I used Fel Pro rubber gaskets with my Stealths. The are fine.

The best gasket depends on which valve covers you have. If you have good valve covers then any gasket will work. If your valve covers are bent or warped then you'll need a big thick gasket to have any chance of sealing.

You need to try the real thick cork and rubber gaskets(1/4 to 1/2 inch thick) out there, Mr. Gasket, SCE and probably all the other big gasket companies make them You may, will ' need to tighten them up several times to get them to seal properly but once you got them sealed up they will not leak anymore

Moroso blue rubber with steel core hands down. Not sure if they'll work with a OE cover that has the lip but maybe someone can chime in. No worry about gaskets pushing out or needing to seal with RTV, or buying new ones cause they're reusable.

Cometic. Rubber with a steel core. No leaks, and reusable.

I used to have the old mopar performance chrome valve covers (the tin model, not cast) and would just use the cheap cork style gaskets. They were fine for a one time use. I later upgraded to the Mopar Performace Cast Valve Covers and started using the Moroso blue gasket with steel core. Been on the car for close to 10 yrs now without any issues. I usually check the valves twice a year or so, so they have been on and off many times.

Ok. I should have said stock valve cover with stealth heads. These super performance are just too hard to squeeze. There recommendations of 25 ft lbs of torques on alum heads for a 1/4” bolt is just too much. There thermostat gaskets is made wrong. The bolt holes are too elongated. Won’t be using them again either.

Are you trying to use the pink gaskets with stock stamped valve covers? Greg makes different gaskets for specific applications like yours . It sounds like questions about applications weren't asked before the purchase. Superformance sells a gasket that will work for your particular application all you need to do is ask for the gasket for your valvecover and head combination
I use Superformance gaskets on every part of my engine it's dry everywhere :twocents

Gus

What part number are they? Appears from your description that you’d want the 3184. All the others state in the catalog “for machined surface/ cast or fabricated valve covers”.

Didn’t the factory cast heads have an angle or degree on the valve cover sealing surface along with that same angle or degree on the corresponding factory valve cover

So using a factory valve cover on a flat surface aluminum head is asking for

For a stock v/c and a Stealth Head, I would use a quality cork gasket(felpro), attached/glued to the v/c with ultra black silicone, and dry between the head and gasket.

You just bought the wrong gasket for your application.

The only gasket I know of that really fits W9 heads is a very thin Cometic.

However they seem to last and work great.

Fel Pro I agree valve covers with tabs to lock the gasket into the cover are best. I had an experience a few years ago with a set of fabricated valve covers as it blew a gasket out top end of the track no damage but I have found that valve covers that are smooth on the bottom with no lip and/or tabs have no means of holding the gasket in place at least on my combination. I went back to the M/P cast ones I have ran for years with no problems. I also have studs with nuts instead of bolts to hold the valve cover in place as it makes gasket placement easier upon removal of the cover.

The reuseable MOROSO blue ones are the BEST I've tried. They are so thick you might need longer bolts. I had to get longer bolts.

I've tried many of them on my roadster and they would always vibrate loose and leak a little. A little oil makes such a mess by the end of the season.

Not the MOROSO ones, they stay tight, stay put and stay dry.

Only times I've had VC gasket problems were on rounded head surfaces or valve train interference.
I pretty much always use cork, glued to the VC & a light smear of grease on the other face.
Obviously the surfaces must be straight & flat.
Make sure intake runners & pushrods & valvetrain aren't interfering.
On one engine, the rocker stands at the ends were actually holding the VC off the head. Beveled them.
On another, the VC spacers I used to make helped with the head surface and rocker clearance using OEM VCs.

I use the carbon-x Superformance gaskets on my stock head, stock valve cover combo and it's the best gasket I've ever used. Followed the directions and never a leak.

All gaskets in my hemi are Superperformance except head and exhaust.