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Forum > General Smog Check > Question

I have a 1989 Ford F250 with a fuel injected 460ci. I have a new cat back system bolted and flanged together do I need to have it welded to pass smog?

The catalytic convertor recently clogged and the exhaust system was all rusted through so I replaced the cat with a Magnaflow 50 state legal and a force II exhaust from Flowmaster. I haven't had the time to weld it but I need to get my smog done this month. just wondering if I can even get it tested with it just bolted and flanged together.
Answer:

So long as the CAT you used was California certified (50-State Emission Legal) you can pass the smog check with it bolted and flanged on. Having the Catalytic Convertor welded on is not a requirement unless there is a noticable leak where it was installed. As standard practice, smog stations like to see an old CAT which was cut off and replaced with a new one, welded on. And CAT removed simply by lossening bolts, bolted back on. posted by SmogTips Support

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