Weiand Engine Intake Manifold Gasket Set

Weiand Intake Manifold Gasket Sets: Sealing Built for Performance

When you invest in a Weiand intake manifold — whether it's a legendary Hi-Ram, a Stealth dual-plane, or a modern LSx unit — the gasket set that seals it matters just as much as the manifold itself. Weiand's Engine Intake Manifold Gasket Sets are engineered as purpose-matched companions to the brand's own manifold lineup, ensuring that decades of performance engineering don't get undone by a vacuum leak or a blown seal.

A Heritage Brand That Understands Its Own Manifolds

The Weiand Company was founded by Phil Weiand as a performance parts warehouse in the 1930s, and the first Weiand product — the "High Weiand" manifold — was manufactured and marketed in 1937 as the first aluminum intake on the market. That deep history means Weiand knows exactly what their manifolds demand from a gasket. In 1968, Weiand introduced the "Hi-Ram Manifold" and its patented D-port technology — a unique multi-piece design that makes proper gasket selection especially critical. With the unique top plate of Weiand's Hi-Ram and Tunnel-Ram intake manifold, it's critical that you use the correct gasket to reduce the risk of a vacuum leak between the top and the runner section.

What's in the Weiand Gasket Lineup

Weiand offers gasket sets spanning several of their most popular manifold families and engine platforms:

• Hi-Ram Replacement Gaskets (e.g., part #8990): Designed specifically for Hi-Ram top-to-base manifold assemblies, including gaskets compatible with Vintage Hi-Ram configurations and assemblies such as P/N 1995, 2993, and 1993.
• Small Block Chevy Gasket Set (e.g., part #8984WND): The Weiand 8984WND Intake Gasket Set for Chevy Small Block applications offers high-quality sealing that is durable under heat and pressure, backed by a 1-year warranty.
• LSx Intake Manifold Gasket Kit (part #108-117): The Weiand LSx Intake Manifold Gasket Kit serves as a replacement gasket set for the 300-111 and 300-111P manifolds.
• LT1 O-Ring Kit (part #508-25): A replacement LT1 O-Ring kit designed for port-to-head sealing, compatible with Holley LT1 intake applications on GM vehicles.

Why Proper Gasket Selection Matters on a Performance Build

Weiand intake manifold gaskets provide reliable sealing under high heat and pressure — essential for performance builds. Running a high-output engine puts enormous thermal and mechanical stress on every sealing surface. A mismatched or low-quality gasket can allow unmetered air into the intake tract, throwing off the air/fuel mixture, causing rough idle, and robbing power that your manifold was designed to deliver. Weiand gaskets are spec'd to match the port shapes, bolt patterns, and compression requirements of their own manifold castings, eliminating the guesswork that comes with universal-fit alternatives.

In 2005, Weiand began designing manifolds on Computational Fluid Dynamics software to deliver perfectly designed runner lengths for maximum air/fuel delivery — a level of precision that demands equally precise sealing. Using a Weiand gasket set with a Weiand manifold ensures the entire system performs as engineered, from the cylinder head flange to the carburetor or throttle body mounting pad.

Today, Weiand offers intake manifolds, water pumps, and oil pans for popular Small Block Chevy, Big Block Chevy, Small Block Ford, Big Block Ford, and Gen III/IV LS applications — and their gasket sets cover this same broad range of platforms, making it straightforward to source the correct sealing hardware alongside any Weiand manifold.