How to Install a Flowmaster Muffler on a Mustang

Flowmaster mufflers will give your Mustang a deep exhaust note.

Flowmaster pioneered the refinements that have made swapping out mufflers one of the most common changes for those looking to get a little more out of their car. The exhaust note that a Flowmaster muffler makes is much more aggressive than the stock mufflers that the Mustangs come with. Now that Flowmaster makes direct replacement mufflers any do-it yourself Mustang owner can change from the stock muffler to a Flowmaser muffler in their own backyard.

Things You'll Need

• Jack stand
• Hack saw or rotary tool
• Steel file
• 2 1/2-inch exhaust U-clamp
• Wrench

Instructions

1. Brace the exhaust pipe by placing a jack stand beneath the exhaust pipe. The jack stand keeps the pipe from falling as the muffler is cut off the pipe.

2. Cut the original muffler off the exhaust pipe directly behind the muffler with a hacksaw or rotary tool. Debur the cut edge of the exhaust pipe with a metal file to round over sharp edges.

3. Remove the original muffler from the muffler-body mount by pulling the muffler towards the center of the Mustang.

4. Place the Flowmaster muffler mounting hook into the muffler-body mount by sliding the hook into the runner bushing in the center of the mount.

5. Push the muffler onto the exhaust pipe. The pipe slides into the tube extending out of the back of the muffler.

6. Place a 2 1/2-inch U-clamp around the joint between the muffler and exhaust pipe and secure the clamp into place by tightening the two bolts. If the Mustang is a GT with dual exhaust, complete the same process with the other muffler.

References

• Ford Muscle: Flowmasters