4"

4″ Universal Catalytic Converters

Our 4″ universal catalytic converters are engineered for serious performance applications — including high-boost turbo builds, large-displacement V8s, and heavy-duty diesel setups. Designed to deliver maximum flow while maintaining emissions compliance, these cats are the top choice for high-horsepower vehicles that need to breathe freely.

Featuring robust stainless or mild steel construction and a high-flow metallic substrate (100 or 200 cell), these converters handle extreme temperatures and pressure without breaking a sweat. Ideal for fabricators, performance workshops, or DIY exhaust builders who need flexibility in sizing and layout.

For a complete build, pair your 4″ catalytic converter with:

Also available in 3½″, 3″, and smaller sizes. Browse our full universal catalytic converter range to suit any project.

Engineered for flow. Built for power. Shipped Australia-wide.

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