Flowmaster Original 40 Series Mufflers
The muffler that started it all, the original 40 Series Muffler is an aggressive sounding street/strip muffler that delivers a powerful “Flowmaster Sound” you’ve heard so much about it. If you really want to hear your exhaust system and that great muscle car tone – from both inside and out of the vehicle – the 40 Series is for you.
Application Reccomendations:
- The original high performance Flowmaster muffler
- Aggressive sound for the enthusiast you likes their exhaust LOUD
- Available in either aluminized steel or 409S Stainless
- Stainless steel mufflers covered by limited lifetime warranty
- Fully MIG welded for durability
| Description | Part No. | List Price |
Click For Details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER Inlet Diameter: 2.25" Outlet Diameter: 2.25" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
42441 | $140.85 |  details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER Inlet Diameter: 2.25" Outlet Diameter: 2.25" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
42443 | $140.85 |  details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER Inlet Diameter: 2" Outlet Diameter: 2" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
425404 | $140.85 |  details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER Inlet Diameter: 2.50" Outlet Diameter: 2.50" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
42541 | $140.85 |  details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER Inlet Diameter: 2.50" Outlet Diameter: 2.50" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
42543 | $140.85 |  details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER Inlet Diameter: 3" Outlet Diameter: 2" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
430402 | $140.85 |  details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER Inlet Diameter: 3" Outlet Diameter: 3" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
43041 | $140.85 |  details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER Inlet Diameter: 3" Outlet Diameter: 3" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
43043 | $140.85 |  details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER STAINLESS STEEL Inlet Diameter: 2.25" Outlet Diameter: 2.25" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
8042441 | $173.64 |  details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER STAINLESS STEEL Inlet Diameter: 2.25" Outlet Diameter: 2.25" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
8042443 | $173.64 |  details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER STAINLESS STEEL Inlet Diameter: 2.50" Outlet Diameter: 2.50" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
8042541 | $173.64 |  details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER STAINLESS STEEL Inlet Diameter: 2.50" Outlet Diameter: 2.50" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
8042543 | $173.64 |  details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER STAINLESS STEEL Inlet Diameter: 3" Outlet Diameter: 2" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
80430402 | $173.64 |  details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER STAINLESS STEEL Inlet Diameter: 3" Outlet Diameter: 3" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
8043041 | $173.64 |  details |
| FLOWMASTER ORIGINAL 40 SERIES MUFFLER STAINLESS STEEL Inlet Diameter: 3" Outlet Diameter: 3" Diameter: 4" OAL: 19" Case Length: 13" Width: 9.75" Height: 5" Weight: 12 |
8043043 | $173.64 |  details |