Exhaust Gasket Universal 4in Collector Flg 3 Bolt

The REMFLEX Exhaust Gasket Universal 4in Collector Flange 3-Bolt is a precision-engineered graphite gasket designed for high-temperature exhaust manifold and collector applications. This 4-inch diameter gasket features a 0.125-inch thickness and three-bolt mounting configuration, providing a dependable seal in demanding thermal environments where standard gaskets fail prematurely.

Constructed from graphite material, this gasket excels in high-heat scenarios typical of performance exhausts, modified engines, and industrial applications. The 0.125-inch thickness strikes a balance between sealing capability and compression tolerance, accommodating variations in collector flange flatness without requiring excessive bolt torque. The three-bolt pattern provides secure mounting while minimizing fastener count—critical for applications where access is limited or vibration is a factor. Each gasket is manufactured to tight tolerances to ensure consistent performance across repeated thermal cycling, preventing exhaust leaks that compromise performance and increase emissions.

This universal gasket serves engine builders, performance shops, vintage vehicle restorers, and DIY enthusiasts working with custom exhaust systems. It's particularly suited for turbocharged and supercharged applications where sustained high temperatures exceed the limits of composite gaskets. The pair format (two gaskets per package) makes it practical for dual-collector manifold setups or for maintaining spare gaskets for critical systems. Whether addressing a blown collector gasket on a street machine or sealing a hand-fabricated manifold on a race build, this REMFLEX gasket delivers proven reliability.

REMFLEX has built its reputation in the automotive aftermarket by focusing exclusively on gasket design and manufacturing. Graphite gaskets are the preferred choice for permanent installations and high-performance applications because they maintain integrity under continuous heat cycling, resist blow-out better than cork or composite alternatives, and do not degrade when exposed to fuel, oil, or coolant residues. The collector flange design is standard across a wide range of engine platforms, making this a practical inventory item for any shop or serious builder.