Chrysler 413-440 V8 PERFORMER RPM 440 (1500-6500 rpm) Designed for 413-426-440 c.i.d. Chrysler V8s. Dual-plane design results in excellent low-rpm torque and outstanding high-rpm hp. For high-performance street/strip applications. Will not fit 1962-64 Max Wedge heads. Carburetor Recommendations: Edelbrock Thunder Series AVS or Performer Series carb, 650-800 cfm, use our #1481 or #1843 Throttle/Transmission Lever Kit. Installation Notes: Recommended intake gasket: #7225. Manifold height: A-4.90", B-5.80" see A/B Measurements. Manifold is 1.7" taller than stock. Port exit dimensions: 1.13" x 2.09". Manifold measure 8.75" across block.