WEIAND INTAKE MANIFOLD This Weiand Air Systems® Action+Plus manifold is designed to increase the performance of the Street Avenger 570CFM Carburetor (ZX482264U) in your Ford 221, 260, 289 or 302 V-8 engine (excluding BOSS)and in your Chevrolet 262, 283, 305, 327, 350 nd 400 V-8 engine with aluminum heads. Low-rise/dual plane design Idle-6000 RPM power band Square flange carburetor mounting. No EGR provision. Port size: 1.90"H x 1.12"W. Will NOT fit 255 or 351W engines. Will fit on 1983-later 5.0L H.O. Mustangs. Will work with cruise control. Manifold has a rear water crossover. Not legal for street use with a 4-barrel carburetor in California on vehicles equipped with a 2-barrel carburetor for which there was no 4-barrel option. Limited one-year warranty.