Butler Hurricane Pontiac 326-455 Intake Manifold, Satin - CNC Port Matched to Out-of-Box Edelbrock Heads BPI-INTAKE-HUR-PM-OOB

About the Butler Hurricane (Satin) intake: STOCK height and angle for Ram Air and Shaker applications or any application with limited hood clearance. **stock carb. height and angle** flows up to 300cfm- Spread bore & square bore bolt patterns. Will Not Fit Pre-1965 The Hurricane was designed to meet the Street/Strip needs of a broad market segment – owners of Pontiacs who need an intake that will fit under their hood and that will feed ported cylinder heads. Fits under all Pontiac hoods including the Trans Am "Shaker", Features a dual flange for use with 4150 and Quadrajet carburetors, Heat crossover deleted, Cast in bosses to accommodate nitrous injectors, As cast port match to standard Pontiac port. Adequate material for RA IV port match. (may not have enough material to seal on a ported Edelbrock head) Same design and casting as the original Performance Products PPR-56031 modeled after the Holley Street Dominator Intake

Matched to out-of-the-box Edelbrock heads. Even a brand-new intake and a brand-new set of Edelbrock heads don't line up — the castings carry extra stock and a factory mismatch at the port face. We machine this manifold's ports to the true out-of-box Edelbrock D-port / round-port opening and blend them into the runners, so a fresh top-end bolts together with a clean, stepless transition instead of a step. Bolt-on; no hand grinding required.

The Butler CNC port-matching process. A port match is only worth doing if it's done right. Out of the box, an intake manifold and a cylinder head are cast separately and never machined to meet each other — leaving a step, offset, or size mismatch at the port opening that trips the incoming air and fuel right at the doorway to the cylinder, exactly where you least want turbulence. For years the only fix was a gasket scribe and a die grinder by hand: slow, inconsistent side to side, impossible to repeat, and easy to over-grind into a reversion step that actually costs you flow. Butler invested in a better way. Every Butler port match is modeled in 3D from the actual head port, programmed into repeatable toolpaths, and cut on our 5-axis Haas UMC machining center using dedicated fixturing that locates every manifold exactly the same way. Each opening is machined to the correct size and shape, then blended smoothly back into the manifold's own casting so the transition is gradual rather than a cliff — identical on all eight ports, cylinder to cylinder.

Why it matters. A machined match is precise, symmetrical, and repeatable, and it's matched to the real port it bolts to — not a generic gasket outline. You get the airflow benefit of a perfect port match without the risk of a hand-grinding mistake that can't be undone. Modeled, machined, matched, and finished in-house by Butler Performance — the Pontiac experts.