Edelbrock part 7310 head gasket is intended for Small Block Chevy Performer and RPM Heads. This gasket comes as a set and is for 1957 - 1985 engine sizes 283 - 302 - 307 - 327 - 350 - 400 without steam holes. This has a 4.190 bore size, .038 compressed thickness and 8.60 cc volume.