Title: design flaw
Product review: We received our manifold/cat and I was hopeful that it would be as easy to put in as the other reviews had described. The plates between the cat and manifold were not flat - thus after installation the gasket raddled and exhaust still leaked out of the car. A Machine shop had to flatten the parts for them to work properly. Quite the hassle and inconvenience for a home repair. Luckily I'm not working so the car could sit for a few days until repaired.
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