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Old 04-02-2015, 09:30 PM
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Magnaflow Exhaust Issues

Just installed my Magnaflow today. I love the sound but I'm having issues. The clamps behind the X pipe don't clamp done enough so there's water spurting out until the pipes warm up enough to expand. There's also a bad vibration during idle and I swear I lost quite a bit of low end torque. It's such an easy straightforward install and I trust the shop w my life. They suggested welding all the joints.

Anyone else w the Magnaflow have or had similar issues.

BTW - I'm not throwing any code errors so there shouldn't be any back pressure issues I wouldn't think.

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Old 04-02-2015, 11:47 PM
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Re: Magnaflow Exhaust Issues

On other vehicles I have owned with Magnaflow (and Magnaflow style clamps) you need to tighten them down with an impact gun (not a ratchet).
You will be surprised at how much more they tighten
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Old 04-03-2015, 07:20 AM
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Re: Magnaflow Exhaust Issues

For the vibration issue, check carefully along the entire exhaust to see if it's hitting the undercarriage somewhere. I have had those issues before with bad installs on some cars where they were too lazy to check clearances.

Clamps should be able to be changed or tightened to fix the leaking issue, but that could also be a minor source of your TQ woes, if you add the X pipe into the equation as well. I'd think Muffler weld would be an easier solution than welding each joint, but it shouldn't be leaking in the first place, unless they don't have great tolerances.
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Old 04-03-2015, 11:58 AM
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Re: Magnaflow Exhaust Issues

Thanks guys - I talked to Magnaflow this morning. The gentleman said they can send new clamps or I can go ahead and weld the seams, it won't effect the warranty. He also said there is prob an air leak at the same seam that is spurting water and that's most likely the cause of TQ issues. Going to try and get it welded later this afternoon - hopefully that fixes the issues.
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Old 04-03-2015, 05:36 PM
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Re: Magnaflow Exhaust Issues

Shut up I read all of the page
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