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These high flow cats adopt the same honeycomb pattern thatfilters out and scrubs the exhaust fumes. But unlike a conventional cat, the honeycomb lattice inside of a high flow catalytic converter has wider cross-sections. With larger passages, air flows more freely.

People also ask


  • Are high flow Cats worth the money?

  • Put more simply: If you’ve made major upgrades to your engine, which are defined as increasing power 20-30% (or more), then high flow cats are for you. If you’ve just added a cold air intake or performance engine tune, your money is probably better spent elsewhere.

  • Why is a high-flow catalytic converter more efficient?

  • To explain why a high-flow cat is more efficient, first it鈥檚 important to understand what the catalytic converter does and how. The catalytic converter is part of the vehicle鈥檚 emissions control systems. Waste gasses from the motor contain harmful smog chemicals such as hydrocarbons, carbon monoxide and nitrogen oxides.

  • What makes a high-performance cat high performance?

  • Part of the science behind the best high-performance cats on the market involves the use of a metal substrate or core. Compared with a ceramic substrate, you can see that the metal core is far less restrictive in nature, thanks in large part to the thinner wall structure that is obtainable with metal.

  • What is a high flow exhaust system?

  • Performance modifications to the exhaust system always focus on increasing flow capability to allow the engine to breathe more easily so that it can make more power. The more quickly the catalytic converter can do its job, the higher its flow capability is. High flow units typically use honeycomb designs.