How To Replace A Muffler

3.0/5 rating (5 votes)
  • Difficulty: Advanced
  • Avg. Time Necessary: 3-4 Hours
  • Cost: $800


These procedures will show you how to remove the factory muffler from your 993, the installation is the reverse of these steps.

Basic tools needed to complete this job:

2 x 13 mm open or close end wrench

Snap ring pliers

13 mm socket and 10 mm socket with ratchet

6 mm hex key (only needed if your car is 96 or up)

Step 1: Loosen the 13 mm bolts that holds the exhaust tips on

Image:993 Muffler Change - 1.jpg

Step 2: After removing the bolts, use the snap ring pliers to spread open the flange that secures the tips to the muffler and remove the muffler tips. You can also use your fingers to spread the clamp (if they are strong enough). Slide the clamp slighty over onto the muffler pipe.

Image:993 Muffler Change - 2.jpg

Step 3: Loosen the 13 mm bolt that is on the flanges on the other end of the muffler pipe that attaches to the CAT.

Image:993 Muffler Change - 3.jpg

Step 4: Use the snap ring pliers to open up the flange and slide the flange so it rests on the CAT side. This will save you a step when installing the replacement muffler. You can also use your fingers to spread the clamp (if they are strong enough). Slide the clamp slighty over onto the muffler pipe.

Step 5: Remove the strap that holds the muffler in place, on the 95 993s that strap is held together using a 13 mm bolt, on 96+ 993s the bolt is a 6mm hex bolt. Slide the strap out of the way and lift the muffler up from its clip and the pipe that is resting on the CAT. the muffler will drop down.

Image:993 Muffler Change - 4.jpg

Step 6: This step only applies to RSR Special customers, I do not include the heat shields on the RSR Special when I send them. You will need to remove the heat shield on your original muffler using a 10 mm socket to remove the 2 bolts and remove the bolt clip underneath it and transport it over to the replacement muffler.

Installation procedure is the reverse of these steps. When mounting the exhaust tips back do not tighten the bolts all the way, leave enough slack so the tips are still moveable. Once the desire position is adjusted tighten the bolts down.

P.S. The mystery muffler on these pictures is the Fabiani 2nd generation system. Donor car for this DIY is Robin's 96 993.

Did you like this guide? Support the original creator by clicking the "Original Article" link at the top of the page.

Did we miss anything or post dead links? Let us know at

Also, Support us by bookmarking the link below and using it before you buy anything. It costs you nothing extra, and it lets us keep producing free content for car people everywhere.


Thanks for your support!




All auto modifications and repairs listed at are to be done at your risk. does not, at any point, assume responsibility of any injury, damage, or charges that may occur through modifying or repair of your or anyone else's car. Car modifications are to be done at your discretion and should be done by qualified individuals. Please check your motor vehicle regulations regarding any car modifications or car tuning you may do to ensure they are street legal.