Aftermarket Muffler Repair

A few years ago these came to me due to some internal rattle on a 996. Instead of spending money fixing old mufflers (I think they are GHL’s), the customer upgraded to new Fabspeeds. Instead of tossing them, I hung on to them for some reason. I came in on Sunday to see if I could do anything with them. I cut the cans open and found a bunch of broken screens, etc that had been rattling. So I gutted them and closed them back up. Should be a good exhaust note:

After welding everything back together.

And a little high temp paint. Can’t wait to install them.

GHLKansas CityPorscheRennsportKC

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Mark M

June 29, 2012 at 2:31 PM

The mufflers on my 996 are making that same rattle! Temporarily I just took the mufflers off and bought some 2-1/8″ mandrel bent 90s and am running those out the back. I think I’ll cut the muffler apart and try removing the screens like you did here. Have you tried these out after removing them? How does it sound? (My home-built bypass pipes are waaaay too loud)

    porschedoc

    June 29, 2012 at 3:18 PM

    Hi Mark,

    If you are still running the stock mufflers, you can open them up and reweld the broken baffles to repair them. These were a little different as they are aftermarket, they were aggressive when back on the car, but not like muffler bypass pipes 🙂

    The broken internal baffles on the OEM mufflers is a fairly common issue.

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