Holley Sniper Fabricated Manifolds continue to push the aftermarket by introducing intakes for Big Block Chevy Engines. These Intakes are good looking, perform well, and offer an extremely good value for a performance sheet metal style intake manifold. Each manifold is precision fixtured and welded for a perfect fit and maximum structural integrity. They are ready to bolt on out of the box and offered in a single or dual 4150 or 4500 carb flange.