Professional Products 54061 Satin Intake Manifold for Ford Mustang 4.6L Ford Mustang GT, Ford Mustang, Polished Aluminum Intake Manifold Developed in conjunction with Mustang specialists, this manifold has been chassis dyno proven to produce as much as 20 more rear wheel hp than a stock manifold at 6,500 rpm More torque from 4,000 rpm on up