Edelbrock Performer RPM Oldsmobile 330-403 Intake Manifold - Port Matched to Olds 61025 Heads EDL-7111-PM

About the Edelbrock Performer RPM for Oldsmobile intake: Performer RPM Olds SB 403 Intake Manifold, 330-403 Engines, (Non-EGR) Edelbrock part #7111 Performer RPM Oldsmobile 350 intake manifold is designed for 330-350-403 c.i.d. This Oldsmobile manifold is a high-rise, dual-plane design with 180-degree firing order engineered for maximum top-end horsepower while maintaining throttle response. Port flange has extra material above the runner for use with cast iron 455 heads and Edelbrock Performer RPM heads #60519 Has clearance for HEI distributor. Carb pad accepts square-bore carbs without adapters. — Can be used on 61025/61029 Olds 403 Heads with port match option

Matched to the Oldsmobile 61025 heads. This Performer RPM is machined to the 61025 intake port and blended into the runner for a smooth, stepless intake-to-head transition on your Olds 330-403.

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.