Need a replacement catalytic converter for your 2018 Mazda 3? MagnaFlow offers high-quality, OEM-Grade catalytic converters engineered for various 2018 3 sub-models and engine sizes, designed to keep the check engine light off. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. To find the correct catalytic converter, select your 2018 Mazda 3 sub-model and engine size, along with your state vehicle registration. This will ensure you purchase a converter that fits your vehicle and meets your state's emissions regulations.

Need a 2018 Mazda 3 replacement exhaust system? Shop all BRExhaust 2018 Mazda 3 Direct-Fit Replacement Exhaust Systems to find the best aftermarket kit to replace your 2018 Mazda 3 OEM exhaust.

MagnaFlow offers 2018 Mazda 3 exhaust systems from the Street Series. These exhaust kits feature durable stainless-steel construction and are compatible with the Grand Touring, Sport and Touring trim levels equipped with the 2.0L inline-four or 2.5L inline-four engine options. All systems are covered by a limited lifetime construction warranty. Select your '18 Mazda 3's sub-model, engine size and vehicle details to shop all available exhaust systems for your car.