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Modern powertrain systems, both diesel and gasoline, have achieved an extremely high level of complexity in order to comply with customer demands on performance, fuel efficiency, comfort, as well as regulatory requirements. This leads to relatively high costs of the complete engine and exhaust gas after-treatment system of a vehicle. Therefore, every component needs to be optimized. Metallic substrate catalyst components have been developed and manufactured with optimized fluid dynamic and turbulent flow characteristics leading to smaller components, offering equal or better performance compared to conventional straight channel substrates. The smaller, advanced metal substrate components are easier to package, can be installed closer to the engine, weigh less, and can reduce the necessary precious metal content. This helps in conserving natural resources, and enables original equipment manufacturer to meet their technical targets at lower costs.