Matched to Edelbrock Performer and Performer RPM cylinder heads and manifolds, Edelbrock's Intake Gaskets allow for optimum flow and performance. The new MP-2N Micropore® technology does not use solvents making our gaskets environmentally friendly. Impervious to most chemicals, this synthetic fiber composite provides a high recovery under load. This means that when compressed, the gasket will conform to any imperfections on the sealing surface even using lower flange pressures. A nitrile bead around each port opening makes the seal even better.