JBROPARTS 1404 Exhaust Manifold Gasket Set for Small Block Chevy 262-400 CID

Overview

Upgrade the exhaust seal with the JBROPARTS 1404 gasket set. Designed for a broad range of Chevy small-block engines and compatible GM applications, these gaskets blend durable materials with a precise port design to help maintain a reliable seal under hot exhaust conditions. Expect a confident fit and a quieter, steadier engine note as part of a well-executed repair or restoration project.

What makes this gasket set notable

The gaskets feature square-port geometry and a 1.50 x 1.50 inch port size, paired with a high-temperature resistant material that includes a steel core. This combination supports rigidity and improved sealing performance as the exhaust system heats and cools through daily driving and longer trips alike.

Compatibility and Coverage

Compatibility spans a wide range of Chevy small-block engines from 262 (4.3L) to 400 (6.6L) cubic inches. The set also aligns with select GM vehicles, including various late-model and older trucks and SUVs known to share this small-block configuration. If you’re restoring an actual or a swapped engine in a classic Chevy or GM chassis, this gasket set is worth checking against your build sheet or service manual.

What’s inside and how it helps

• Two exhaust manifold gaskets included — ideal for a full dual-manifold or a single-service replacement.
• Square-port design, with port sizing at 1.50 x 1.50 inches for consistent seating and sealing.
• High-temperature resistant material with a steel core for durability under heat cycling and engine vibration.

In real-world terms, this gasket set supports a solid seal that can reduce exhaust leaks, preserve engine efficiency, and contribute to a more balanced exhaust tone. While results depend on condition, installation accuracy, and surrounding components, a well-sealed manifold is a positive step in any repair or rebuild workflow.

Practical notes

• Part number: 1404 — use this exact replacement to verify fitment during repairs.
• Package includes two gaskets, ready for installation in compatible engines.
• After-sale service is available if you need assistance with your purchase.

Whether you are restoring a classic Chevy, completing a performance upgrade, or simply addressing an exhaust leak, the JBROPARTS 1404 gasket set offers a practical balance of material quality, compatibility, and value.