CHEVY 348-409 - STEEL SHIM HEAD GASKETS - PAIR OF 2
Steel shim head gaskets have .020" compressed thickness for higher compression compared to .038" composite gaskets.
*Roughly 1/2 point higher compression ratio compared to .038" composite head gaskets.
*Embossed to seal against extreme cylinder pressures.
*For use in high performance street and race applications.
*4.530" bore.
Chevrolet 348, 409 Engines