Stop choking your mid-size car. Instead, buy one of our Audi 4000 catalytic converters that allow more exhaust movement. A special honeycomb shaped precious metal catalyst maximizes internal surface space in the 4000 catalytic converter from AutoAnything. So, your engine produces more horsepower, more torque and fewer emissions.
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Our Audi 4000 catalytic converters are crafted from 16-gauge stainless steel. All of the seams are welded. This thing is tough. Your new 4000 cat converter is backed by the AutoAnything 1-year lower price guarantee. What's more, our shipping is free. So, buy today to receive great savings on the best cat converter in the business.