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This interesting aluminum intake is an original Ford 406/427 dual-quad casting. It’s a rare manifold the owner wants to run to keep the vintage FE look underhood. Many machine shop onlookers speculated that the early design intake could cost as much as 100 hp. Although some power might be lost at the top end when compared to a modern single-plane intake, it probably won’t be missed in a 2,000-pound street-driven sports car.