This is our top-of-the-line medium profile Holeshot Plus Series manifold. It is similar to our PCE147.1001 Holeshot, although slightly taller, but with several important modifications. First, it has a square bore carb flange instead of a spread bore. The square bore flange permits direct bolt-on of all popular Holley, Edelbrock, Carter, and Demon carburetors. This manifold is also one of the only aftermarket produced intake for the Boss 351c. This intake will provide better overall water flow and cooler engine operating temperatures. It also features nitrous bosses, and rear water ports that are partly machined for more options. This manifold will typically produce more power than any similar competitive manifold due to larger ports and runners.