Just as the subject says, who makes the best intake manifold gaskets for the LT4. Mine were leeking so I pulled th manifold. I don't want to use the GM ones that I used last time, and the Felpro LT1 gaskets have an opening that is too small. Does anyone know of any options?

 

Doesn't Fel-Pro make an LT4 gasket?

 

Felpro has an LT4/LT1 gasket that I tried and it didn't work. If they have an LT4 specific gasket the guy at autozone couldn't find it in the computer.

 

I use the GM Race Port LT4 Intake gaskets they are the only ones that match an LT4 . p/n 12367777.

 

As long as it is understood these gaskets (#7777) are not necessary if the intake port of plenum is not ported to match.