Exhaust Gaskets 4 Bolt

Prevent leaks and pressure loss in your high-performance system with our professional-grade 4-bolt exhaust gaskets. Designed for applications where a standard 2 or 3-bolt flange isn't enough, the 4-bolt configuration provides superior clamping force and even pressure distribution. These gaskets are essential for high-heat environments like turbocharger outlets, custom dump pipes, and performance extractors. Whether you are performing a simple repair or a full custom build, our range of reinforced composite and fire-ring gaskets ensures a gas-tight seal that stands up to the most demanding Australian driving conditions.

When should I use a 4-bolt gasket instead of a 2 or 3-bolt?

A 4-bolt gasket is typically used in areas where maximum sealing pressure is required, such as turbo manifold outlets or large-diameter performance headers. The four bolts allow for more consistent torque around the entire circumference of the pipe, preventing the flange from warping and the gasket from "blowing out" under high pressure.

Are these 4-bolt gaskets reusable?

No. Most performance 4-bolt gaskets are designed to compress (or "crush") to fill the imperfections between two metal flanges. Once removed, the material has lost its ability to compress a second time, which often leads to leaks if reused. Always install a fresh gasket during reassembly.

What is a "Fire-Ring" in an exhaust gasket?

A fire-ring is a reinforced metal ring (usually steel) located on the inner diameter of the gasket. It acts as a primary barrier against the direct heat and pressure of exhaust gases, significantly increasing the gasket's lifespan in turbo-diesel and high-performance petrol applications.

How do I match a 4-bolt gasket to my existing flange?

You need to measure three key points: the Inside Diameter (ID) of the pipe, the bolt-to-bolt centers (diagonally), and the bolt hole size. For example, our common 3" universal 4-bolt gasket fits a 77mm ID and is designed to match standard Australian fabrication flanges.