PMO Intake Manifold Sets, CIS Injection, Raw Aluminum Finish, for Porsche 911 356a b These Billet Valve Covers are Journal Type 4 914 These Billet Valve Covers are CNC Machined from 6061 T 6 Aluminum and are available in 4 different colors including red These spark plug wires still retain the superior quality spark plug boots and 32" unassembled coil wire to meet your demands for the best ignition wire set available 0 Large Port PM O912 0 46mm 42mm Tall Ported Heads PM O913 0 50mm 42mm Tall Race Ported CIS Heads For manifold selection first determine the base engine’s year and displacement PMO recommends running isolators on all the PMO intakes to help prevent heat transfers