Engine Kits

Flowmaster Exhaust 40 Series Original Flows­ Mufflers

Flowmaster Exhaust The 40 Series The Original Flows (American Thunderis the most aggressive sounding street and strip muffler in Flowmaster's product line. If you are looking for the original "Flowmaster tone," the 40 Series is the one.

The performance street and  strip muffler will also generate interior resonance  within the vehicle. So if you want to really hear your  exhaust system inside the vehicle as well as outside it, the Flowmaster Exhaust 40 Series Original Flows (American Thunder)­ is for you.

 

  • Aluminized Steel, 16 Gauge for Durability
  • Off Road and Race applications
  • Early and Late Model Street/Strip Vehicles with or without Catalytic Converters
  • Original Flowmaster Exhaust Tone  
  • Powerfull Exterior Tone Level
  • Vehicles with Dual Exhaust*

* H-Pipe is strongly recommended in all dual exhaust applications.

 

FlowMaster Exhaust, Quick Links

Flowmaster Exhaust 40 Series Original Flows

Flowmaster Exhaust 40 Series Delta Flow

Flowmaster Exhaust 50 Series Delta Flow­

Flowmaster Exhaust 50 Series SUV

Flowmaster Exhaust 50 Series BIG BLOCK

Flowmaster Exhaust 70 Series

Flowmaster Exhaust 80 Series

Flowmaster Exhaust Scavenger Series

FlowMaster Exhaust American Thunder Cat-Back



This product is in the following categories:

HomeExhaust and EmissionsMufflers

Manufacturer:

Flowmaster

Part #: 42441

Inlet: 2.25" Offset , Outlet: 2.25" Center, Overall Length: 19", Body Length: 13", Body Type: 4" x 9.75" O
Price: $83.76
Quantity:

Part #: 42443

Inlet Size: 2.25" Offset, Outlet Size: 2.25" Offset, Material: Aluminized, Body: 4" x 9.75", Case Length: 13", Overall Length: 19"
Price: $83.76
Quantity:

Part #: 42541

Inlet Size: 2.5" Offset, Outlet Size: 2.5" Center, Material: Aluminized, Body: 4" x 9.75", Case Length: 13", Overall Length: 19"
Price: $83.76
Quantity:

Part #: 42543

Inlet Size: 2.50" Offset, Outlet Size: 2.50" Offset, Material: Aluminized, Body: 4" x 9.75", Case Length: 13", Overall Length: 19"
Price: $83.76
Quantity:

Part #: 430402

Inlet Size: 3.00 " Center, Outlet Size:2.5" Dual, Material: Aluminized Steel, Body: 4" x 9.75", Overall Length: 19"
Price: $83.76
Quantity:

Part #: 43043

Inlet Size: 3.00" Offset, Outlet Size: 3.00" Offset, Material: Aluminized, Body: 4" x 9.75", Case Length: 13", Overall Length: 19"
Price: $83.76
Quantity: