Edelbrock part #2186 Performer 383 intake manifold is designed for street 361-383-400 c.i.d. Chrysler V8's that measure 7.75" across block. May be used with OEM or aftermarket carbs. 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. This Performer intake manifold is ideal for passenger cars, trucks, 4x4s, tow vehicles and RVs.