Need a replacement catalytic converter for your 2003 Nissan Maxima? MagnaFlow offers high-quality catalytic converters engineered for 2003 Nissan Maxima sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 2003 Nissan Maxima requirements and state vehicle registration to buy the best Maxima catalytic converter online that fits your '03 Maxima and meets your state’s emissions compliance.

Need a 2003 Nissan Maxima replacement exhaust system? Shop all BRExhaust 2003 Nissan Maxima Direct-Fit Replacement Exhaust Systems to find the best aftermarket kit to replace your 2003 Nissan Maxima OEM exhaust.