( EDE-27014 ) - SMALL BLOCK CHEVY - IDLE TO 5500 RPM - EDELBROCK - ENDURASHINE wont oxidize, fade or turn blue and cleans easily? an industry first for automotive engine components. This environmentallyfriendly process uses two-stage Physical Vapor Deposition (PVD) technology and a top coat to protect the glossy finish for a shine that lasts.