Edelbrock part #2121 Performer 289 intake manifold is designed for street 260-289-302 c.i.d. Ford V8's without EGR. Will not fit Boss 302 or 255 c.i.d. V8's. Edelbrock's Patented Dual-plane, low-rise design with a 180-degree firing order greatly improves torque over a wide rpm range for excellent throttle response from off-idle through 5500rpm. The Performer intake manifolds are ideal for passenger cars, trucks, 4x4s, tow vehicles and RVs. Edelbrock carbs will work with Ford automatic overdrive trans (AOD) when used with Lokar bracket SRK-4000 Intake Section Included: Complete Engine Block Deck Height: Standard deck Carburetor Quantity: One Intake Style: Dual plane Basic Operating RPM Range: Idle-5,500 Intake Manifold Height: 4.120 in. Intake Finish: Natural Intake Material: Aluminum EGR: No Quantity: Sold individually. Notes: Will not fit Boss 302 or 255 c.i.d. V8s. PDF-Installation Instructions