Edelbrock Performer RPM 5.8L Upper Plenum Only (includes plenum cover) is designed for 1988-96 Ford 5.8L, EFI, and truck engines. The modular design of this intake manifold incorporates the latest airflow technology for maximum torque gains in the mid-range. This Upper Plenum offers a removable plenum cover that allows access to runners. The upper is powder-coated light titanium gray. Use with stock or stock replacement twin throttle body. Will not fit vans or stock manifold bases.