Speedmaster 1-147-031 MidRise Alu. Intake Manifold Satin for Chevy SBC

Chevy SBC 350 MidRise Aluminum Intake Manifold Satin The Speedmaster MidRise manifolds, along with the similar MidRise Air, are the most powerful dual plane manifolds available. For non-pollution controlled street machines, these are among the very best manifolds you can use. They feature a square bore carburetor flange, nitrous bosses, four corner water ports, and dual distributor hold downs. These manifolds are approximately 5/8"“ taller than the LowRise series. On medium horsepower engines, dyno tests have shown that this manifold comes very close to producing similar power and torque numbers as our shootout racing intake manifold. Feature a square bore carburetor flange and nitrous bosses Approximately 5/8" taller than the LowRise series Cast from steel molds for a tighter grain and reduction of porosity Pressure tested to ensure maximum performance