4.1 S2 headgaskets/Champion R heads

[BUICKTR]

I wanted to know what if the best headgasket for this combo.

 

[Otto J]

Cometics and spray copper is what i use without a problem.

 

[BUICKTR]

KLHAMMETT

Do the Cometics go on dry? Are there in leaks with these gaskets. How about the felpro 1000? Just wondering if anybody still uses the 1000 anymore.

 

[EightSecV6]

I would use Cometics, dry

 

[10SV6]

I run the Cometics the way Otto is talking about. Bob at RPE recommended using the spray copper. The MLS type gaskets have origins with the OEM's. Chysler in particular originally recomended installing their MLS type gaskets dry. Later they released a TSB recommending a sealer. It takes an extremely smooth surface finish to get to where Cometic recommends. When I originally installed the Cometic gaskets they were replacing Detroits. I cleaned the deck and cylinder head surface and installed the Cometics. No machining.

I look at it this way, the sealer hasn't hurt. I made a bunch of passes in the 35+ psi range. Zero gasket problems.

Cometic recommends installing their gaskets dry.