B & B Muffler

Flowmaster 40 Series Delta Flow Mufflers


Flowmaster 50 Series SUV Mufflers

Flowmaster’s Delta Flow 40 Series two chamber design incorporates Flowmaster’s patented Delta Flow technology. The “Delta” deflectors generate increased scavenging for better performance and reduced interior sound. Perfect for vehicles where an aggressive exterior tone is desired with reduced interior tone.

 

 Application Recomendations:

  • The quietest 40 Series two-chamber muffler
  • Reduced resonance over other 40 series mufflers
  • Stainless steel 409S version backed by a lifetime warranty
  • Features advanced two-chamber design & Delta Flow technology
  • Available in aluminized steel or 409S Stainless for harsh weather
  • Both styles are fully MIG-welded for maximum durability

 

 

Description Part No. List
Price
Click
For
Details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER

Inlet Diameter: 2.25"
Outlet Diameter: 2.25"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

42441 $150.33 42441 FLOWMASTER 40 SERIES
details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER

Inlet Diameter: 2.25"
Outlet Diameter: 2.25"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

42443 $150.33 42443 FLOWMASTER 40 SERIES
details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER

Inlet Diameter: 2 X 2.50"
Outlet Diameter: 2 X 2.50"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

425404 $120.55 425404 FLOWMASTER 40 SERIES
details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER

Inlet Diameter: 2.50"
Outlet Diameter: 2.50"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

42541 $150.33 42541 FLOWMASTER 40 SERIES
details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER

Inlet Diameter: 2.50"
Outlet Diameter: 2.50"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

42543 $150.33 42543 FLOWMASTER 40 SERIES
details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER

Inlet Diameter: 3.00"
Outlet Diameter: 2 X 2.50"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

430402 $150.33 430402 FLOWMASTER 40 SERIES
details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER

Inlet Diameter: 3.00"
Outlet Diameter: 3.00"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

43041 $150.33 43041 FLOWMASTER 40 SERIES
details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER

Inlet Diameter: 3.00"
Outlet Diameter: 3.00"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

43043 $150.33 43043 FLOWMASTER 40 SERIES
details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER STAINLESS STEEL

Inlet Diameter: 2.25"
Outlet Diameter: 2.25"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

8042441 $174.95 8042441 FLOWMASTER 40 SERIES
details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER STAINLESS STEEL

Inlet Diameter: 2.25"
Outlet Diameter: 2.25"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

8042443 $174.95 8042443 FLOWMASTER 40 SERIES
details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER STAINLESS STEEL

Inlet Diameter: 2.50"
Outlet Diameter: 2.50"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

8042541 $174.95 8042541 FLOWMASTER 40 SERIES
details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER STAINLESS STEEL

Inlet Diameter: 2.50"
Outlet Diameter: 2.50"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

8042543 $174.95 8042543 FLOWMASTER 40 SERIES
details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER STAINLESS STEEL

Inlet Diameter: 3.00"
Outlet Diameter: 2 X 2.50"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

80430402 $174.95 80430402 FLOWMASTER 40 SERIES
details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER STAINLESS STEEL

Inlet Diameter: 3.00"
Outlet Diameter: 3.00"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

8043041 $174.95 8043041 FLOWMASTER 40 SERIES
details
FLOWMASTER ORIGINAL 40 SERIES MUFFLER STAINLESS STEEL

Inlet Diameter: 3.00"
Outlet Diameter: 3.00"
Diameter: 4.00 X 9.75"
OAL: 19.00"
Case Length: 13.00"
Width: 0"
Height: 0"
Weight: 12

8043043 $174.95 8043043 FLOWMASTER 40 SERIES
details

 

 

 

 

 





 

 
Col 3