Need a replacement catalytic converter for your 2008 Saturn Astra? MagnaFlow offers high-quality catalytic converters engineered for 2008 Saturn Astra sub-models and engine sizes. We combine efficient design and state-of-the-art manufacturing to meet or exceed required emissions standards. Select your 2008 Saturn Astra requirements and state vehicle registration to buy the best Astra catalytic converter online that fits your '08 Astra and meets your state’s emissions compliance.