Edelbrock Performer RPM Pontiac Intake Manifold, Chrome Plasma - CNC Port Matched to Butler 310/315/325 CNC Heads EDL-7156-CP-PM-325

About the Edelbrock Performer RPM (Chrome Plasma) intake: 7156-CP version comes with a brilliant Chrome plasma finish that is durable and easy to maintain. A desirable choice for modified street engines where more airflow is required street and strip applications. 7/8" taller than stock PERFORMER RPM™ (1500 - 6500 RPM) A dual-plane, high-rise designed with a 180° firing order greatly produces incredible top-end horsepower while retaining great throttle response. Their larger plenums and runners match high-lift cams, free flowing exhausts and other modifications of a high-output engine. Great for street or strip. PONTIAC 326-455 V8 PERFORMER RPM PONTIAC (1500-6500 RPM) Dual flange for Quadrajet or Holley 4150 Designed for 1965-79 street 326-455 c.i.d. Pontiac V8's (except Ram Air V and 265/301 V8's). Pontiac intake manifolds provide maximum high-rpm power while maintaining good throttle response for street. Recommended for high-performance street, strip and marine. Has clearance for HEI distributor. Will not fit under Trans Am Shaker hood without modifications. Pontiac Edelbrock Performer RPM Intake **7/8" taller than stock**Will Not Fit Pre-1965 heads**

Matched to Butler 310/315/325 CNC heads. Our 310/315/325 CNC ports are enlarged, reshaped, and repositioned versus a stock casting, so a standard intake would leave a real step at the port face. We cut this manifold to the exact 310/315/325 port map and blend it into the runner, identical side to side, so the head port and the manifold read as one continuous runner.

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.