LYNSHINE SBC Oval-Port Copper Header Collector Gaskets for Small Block Chevy — 2‑pc Reusable High-Temp Seal

LYNSHINE PH306 copper oval-port header collector gaskets provide a durable, reusable seal between aftermarket headers and the exhaust system on Small Block Chevy engines.

Engineered for classic and crate small-block Chevy V8s, these PH306 copper collector gaskets fit a wide range of displacements from 262 through 400 cubic inches. Made from high-grade copper, each gasket is shaped for oval header ports and built to withstand exhaust heat cycles while maintaining a tight seal. You get a two-piece set designed for installation between the header collectors and the exhaust pipes, ideal for restoration projects, performance upgrades, or replacing worn factory gaskets.

Will these gaskets fit my Small Block Chevy header?

These gaskets are manufactured to match oval-port header collectors commonly used on Small Block Chevy engines. They cover many popular Chevy small-block displacements, but it's always best to compare the flange shape and bolt pattern before purchase.

• Compatible with SBC 262, 267, 283, 302, 305, 327, 350, 383, and 400 engines
• Designed for oval collector ports found on many aftermarket headers
• Sold as a 2-piece set to seal both sides of the collector joint
• Check flange dimensions and bolt layout against your header before installing

How does copper perform compared to other gasket materials?

Copper offers excellent thermal conductivity and is forgiving under repeated heat expansion, which helps maintain a reliable seal in high-temperature exhaust applications. Unlike composite or multi-layer steel gaskets, copper can be shaped and reused in many cases, provided it isn't excessively damaged.

• High heat tolerance reduces the chance of early failure under exhaust temperatures
• Conforms to mating surfaces to minimize leaks when properly installed
• Reusable if removed carefully and not crushed or torn
• Less prone to sticking than some gasket materials when used with proper sealant

What should I expect during installation and maintenance?

Installation is straightforward for anyone familiar with header-to-exhaust connections: align the oval ports, insert the gaskets, and tighten the collector bolts in a crossing pattern to ensure even compression. Routine inspection after a few heat cycles can catch any developing leaks early.

• Clean mating surfaces thoroughly before fitting the gasket
• Tighten bolts gradually and evenly to prevent distortion
• Use high-temperature anti-seize on bolts and consider a thin exhaust-rated sealant if desired
• Inspect after initial heat cycles and retorque if necessary

Who is this for? Enthusiasts restoring or upgrading classic Chevy small-blocks, performance builders swapping headers, and mechanics looking to replace deteriorated collector gaskets will find the LYNSHINE PH306 set useful. These gaskets are especially appropriate when oval-port header collectors are present and a dependable, reusable copper seal is preferred over disposable alternatives. If you need a pair of collector gaskets that balance durability, ease of installation, and broad Small Block Chevy compatibility, this LYNSHINE PH306 2-pack is designed to meet that need.