Not sure which 2003 Buick Regal Catalytic Converters are right for you? We have over 491 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"it was ok. Shiiping took longer than I was toldit would. It fit well but it did notcome with gaskets. You should plan on buying those seperate. It works ok. I do not notice any increase in horsepower, performance, and gas mileage. For the price it is a good product. I would buy it again but this time get the gaskets also." —Candy A from Anchorage, AK bought a Magnaflow Catalytic Converters - 49 State Legal for a 2003 Buick Regal, 3.8L V6.