The Boss 351 intake was cast aluminum and featured a spread-bore pattern. ... The exception was Boss 351 manifolds, which had larger 2.25-inch outlets. See All 31 Photos.

Rick Roback of Union Lake, Michigan, installed one of the first 351W crate motors into his '85 5.OL Mustang. With the Motorsport heaw-dutv T5 5-speed and 8.8-inch differential equipped with 4.56:1 ...

The upper intake mates witheither the R-Series 302 or 351 Trick Flow lower intakes. See All 10 Photos You'll also note the new Trick Flow box upper resembles Ford's '96-'98Cobra intake manifold.

Replacing the standard R-Series upper-intake manifold with Trick Flow's famed Box R topper (PN TFS-51500008; $395.99) is a move that we're excited about.