Flowmaster Mufflers

The American Thunder – 40 Series

Application Recommendations:

  • Off Road and Race applications.

  • Aggressive Tone For Early Street/Strip Cars

  • Early Generation Muscle Cars.

  • Vehicles with dual exhaust. Cross-over pipe is strongly recommended in all dual exhaust applications.

  • 4″ Thick – 9.75″ Wide – 19″ Overall Length – 13″ Case Length.
IN/OUT PART# PRICE
2.25″  42441  $59.99
2.50″ 42541 $59.99
 

 
 IN/OUT PART# PRICE
2.25″ 42443 $59.99
2.50″ 42543 $59.99
 
 IN/OUT PART# PRICE
 Single 3.00″/Dual 2.50″ 430402  $59.99
 IN/OUT PART# PRICE
 3.00″ O/C

Offset Front

Center Back

 43041   $59.99

 
 IN/OUT PART# PRICE
 3.00″ O/O

Offset Front

Offset Back

 43043   $59.99

 

 

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