3.5 Dia Collector Gasket Pair

The 3.5 Dia Collector Gasket Pair by REMFLEX EXHAUST GASKETS is a precision-engineered exhaust manifold sealing solution designed for high-temperature engine applications. These gaskets prevent exhaust leaks at the collector-to-header interface, where combustion heat and vibration demand superior materials and construction. Ideal for engine builders, performance enthusiasts, and technicians, this pair ensures a reliable seal that withstands thermal cycling and maintains engine efficiency over thousands of miles.

Each gasket features a 0.125-inch thickness of graphite composite material—a proven thermal barrier that resists blow-out and maintains integrity under extreme exhaust temperatures. The 3.5-inch diameter provides coverage for standard collector bore sizes, while the 3-bolt mounting pattern ensures compatibility with most aftermarket and OEM collectors. Graphite construction offers superior conformability compared to traditional steel or metallic gaskets, allowing better sealing on imperfect mating surfaces and reducing the risk of exhaust leaks that compromise engine performance and increase emissions.

This pair is essential for anyone replacing worn collector gaskets, upgrading to a performance header, or rebuilding an engine intake. Installation requires only basic hand tools and takes minutes per gasket. The graphite composition makes these gaskets reusable if removed carefully, offering better long-term value than single-use alternatives. Verify 3-bolt pattern and 3.5-inch diameter compatibility with your specific collector before purchase to ensure proper fit and seal.