Fits Holley Hi-Ram Manifolds - Holley has launched new black ceramic coated plenum tops to match our Hi-Ram manifold bases!

They are available in the dual 4150 throttle body pattern or in a full blank top so that you can design your system. The plenum tops are constructed of cast aluminum.

Features

• Single Plane Design with isolated Plenum
• 4150 Square Bore Mounting Flange
• Power band: 2500-7500 RPM
• Height: Front 4.18", Rear 5.28"
• Port Size: 1.92‚Äù height 1.20" width
• Lower Throttle Body Mounting height to help with hood clearance.
• Holley laser etched logos on the black coated fuel rails and bracket assortment are included so that you can install the injectors of your choice.
• Fuel injectors are not included
• Fuel rail designed for maximum throttle lever clearance.