I like these cats. I have a 2008 Chrysler 300C SRT8 and have run it in and recommend all buyers do this to avoid future problems. All necessary documents are included, as well as copies of the product to return for warranty information. Very professional company and quality work with cats. If you are looking for a large flow and small sizes to help with installation I would use these. They can be welded or, like me, just bumped into the existing pipe (the ends are so precise and smooth and clean). I had a 3 inch ID and they were just that. Again. Production and flow control is two-way.
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