Flowmaster Headers and Exhaust

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-7%

Flowmaster |

#378817471

Flowmaster 817471 American Thunder Cat-Back Exhaust System

Exhaust System Type:

Cat-Back

Single or Dual:

Single | Dual Exit

Exhaust Tubing Diameter:

2-1/2 Inch

$1,117.95

/kit

$1,210.95

-11%

Flowmaster |

#378842580

Flowmaster 842580 80 Series Crossflow Muffler, 2.50 In/Out

(1)

Muffler Type:

Chambered

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$188.95

/each

$212.95

-7%

Flowmaster |

#37815362

Flowmaster 15362 Exhaust Tip, 2.5 in. Inlet, 13 in. Long

Exhaust Tubing Diameter:

2-1/2 Inch

Finish:

Polished

$79.19

/each

$85.95

-11%

Flowmaster |

#378943050

Flowmaster 943050 50 Series Delta Flow Muffler, 3.00 In/Out

Muffler Type:

Chambered

Inlet Diameter:

Outlet Diameter:

$173.95

/each

$195.95

-7%

Flowmaster |

#37881055

Flowmaster 81055 Pipe Kit, 2.5in. Impala

Outside Diameter:

2.50"

Exhaust Tubing Diameter:

2-1/2 Inch

Finish:

Raw

$584.95

/kit

$633.95

Choosing the Right Exhaust

That fresh engine deserves all new exhaust bits. Be sure to have a look at our rundown on selecting the best setup for headers, exhaust, and mufflers for your ride here.

Project Chevelle: Exhaust Tech Article

The open headers were fun, but now it's time for a real exhaust on Project Chevelle. Follow along as we quiet things down with a Flowmaster American Thunder dual exhaust kit.

The Sound of Flowmaster Mufflers

If you're ready to get your street machine sounding as good as it looks, it's important to know how each muffler will affect your sound and performance. Take a listen and decide which muffler is best for your rod.

Exhaust Manifolds VS Headers | How Much HP Do Headers Add

Headers and manifolds differ in design and function. Long tube headers, shorty headers, and exhaust manifolds each have their pros and cons regarding performance and application.

Exhaust System Header Wrapping

Whether you’re looking for performance improvements or heat reduction, if you decide to wrap your headers, we'll show you the benefits and possible precautions to take before you wrap your exhaust.

Best Type of Mufflers to Create the Perfect Exhaust Note | Glasspack Muffler vs Chambered Muffler

From glasspack, turbo, and chambered mufflers, to resonators, and more, which muffler is best for you? See our guide to learn more.

Exhaust Repair

Some basic info on the various exhaust options carried by Speedway Motors.

The Exhausting Search for Headers

Having issues fitting headers into your car/engine? This article provides helpful hints on ways to modify or add parts to make the headers fit in your specific car. Kevin W. explains his build experience with headers.

Ceramic Coated Headers

Watch our video on the ceramic coating process for Armor Hot Coating. Headers coated with Armor Hot Coating protect your car without sacrificing looks.

Choosing the Right Headers

Which size of headers should I use? Short or long tube headers? Etc. Learn how to answer these exhaust questions and choose the right header with our expert guide.

-11%

Flowmaster |

#378942041

Flowmaster 942041 40 Series Delta Flow Muffler, 2.00 In/Out

Muffler Type:

Chambered

Inlet Diameter:

Outlet Diameter:

$149.95

/each

$168.95

-11%

Flowmaster |

#378942451

Flowmaster 942451 50 Series Delta Flow Muffler, 2.25 In/Out

Muffler Type:

Chambered

Inlet Diameter:

2.25"

Outlet Diameter:

2.25"

$173.95

/each

$195.95

-7%

Flowmaster |

#37815938

Flowmaster 15938 Ball Flange 2-1/2 Inch Collector to 2.5 Inch

Material Type:

Steel

Flange Style:

2-Bolt

$212.95

/kit

$230.95

-11%

Flowmaster |

#378524554

Flowmaster 524554 50 Series Muffler, 2.25 In/Out

Muffler Type:

Chambered

Inlet Diameter:

2.25"

Outlet Diameter:

2.25"

$199.95

/each

$224.95

-7%

Flowmaster |

#378717847

Flowmaster 717847 FlowFX Direct-Fit Muffler, 2019 Ram 1500 5.7L

Muffler Type:

Perforated Tube w/Packing

Inlet Diameter:

Outlet Diameter:

$449.95

/each

$483.95

-7%

Flowmaster |

#37881073

Flowmaster 81073 Manifold Downpipes, Pontiac

Exhaust Tubing Diameter:

2-1/2 Inch

Hardware Included:

$311.95

/kit

$337.95

-7%

Flowmaster |

#37817165

Flowmaster 17165 Force II Cat-Back Exhaust System, 96-99 GM SUV

Exhaust System Type:

Cat-Back

Single or Dual:

Single

Exhaust Tubing Diameter:

3 Inch

$675.95

/kit

$731.95

-5%

Flowmaster |

#378817492

Flowmaster 817492 Force II Cat-Back Exhaust System

Exhaust System Type:

Cat-Back

Single or Dual:

Single | Dual Exit

Exhaust Tubing Diameter:

2-1/2 Inch

$1,249.95

/kit

$1,325.95

-7%

Flowmaster |

#425818147

Flowmaster 818147 Force II Cat-Back Exhaust 15-20 F-150 2.7/3.5/5

GTIN Code:

090127615676

Exhaust System Kit Type:

Direct Fit

$1,117.95

/each

$1,210.95

-9%

Flowmaster |

#378843016

Flowmaster 843016 Super 10 Series Muffler, 3.00 In/Out

Muffler Type:

Chambered

Inlet Diameter:

Outlet Diameter:

$101.95

/each

$112.95

-8%

Flowmaster |

#37817435

Flowmaster 17435 American Thunder Exhaust Kit, 1996-06 GM Truck

Exhaust System Type:

Cat-Back

Single or Dual:

Single | Dual Exit

Exhaust Tubing Diameter:

2-1/2 Inch

$899.95

/kit

$979.95

-7%

Flowmaster |

#37817126

Flowmaster 17126 Force II Cat-Back Exhaust System, 88-92 GM Truck

Exhaust System Type:

Cat-Back

Single or Dual:

Single

Bed Side Type:

Short & Long

$675.95

/kit

$731.95

-5%

Flowmaster |

#378717787

Flowmaster 717787 FlowFX Cat-Back Exhaust System, 2014-19 GM 1500

Exhaust System Type:

Cat-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

3 Inch

$849.95

/each

$899.95

-8%

Flowmaster |

#378814123

Flowmaster 814123 Scavenger Series Elite Header 2002-13 GM Truck

Header Tube Type:

Shorty

Flange Style:

Standard

Primary Tube Diameter:

1-5/8"

$949.95

/kit

$1,037.95

-6%

Flowmaster |

#378717785

Flowmaster 717785 FlowFX Cat-Back Exhaust System, 2015-19 F-150

Exhaust System Type:

Cat-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

2-1/2 Inch

$949.95

/each

$1,012.95

-8%

Flowmaster |

#378MB125048

Flowmaster MB125048 Exhaust Pipes, 2.50 in. O.D x 48in

Exhaust Tubing Diameter:

2-1/2 Inch

Exhaust Pipe Type:

Custom Tubing

Outside Diameter:

2.50"

$88.25

/each

$95.95

-5%

Flowmaster |

#378817757

Flowmaster 817757 Force II Cat-Back, 2017-19 F-250/F-350, 6.2L

Exhaust System Type:

Cat-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

3 Inch

$1,249.95

/each

$1,325.95

-8%

Flowmaster |

#378717831

Flowmaster 717831 FlowFX Dual Exit Cat-Back Exhaust System

Exhaust System Type:

Cat-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

2-1/2 Inch

$899.95

/each

$979.95

-11%

Flowmaster |

#3788042543

Flowmaster 8042543 Stainless 40 Series Muffler, 2.50 In/Out

Muffler Type:

Chambered

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$135.95

/each

$152.95

-9%

Flowmaster |

#37815430

Flowmaster 15430 Outlaw Series Race Muffler, 3.00 In/Out

Inlet Diameter:

Outlet Diameter:

$149.95

/each

$165.95

-11%

Flowmaster |

#378942549

Flowmaster 942549 Super 44 Series Muffler, 2.50 In/Out

Muffler Type:

Chambered

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$136.95

/each

$154.95

-8%

Flowmaster |

#378T3030

Flowmaster T3030 Scavenger Turndown, 3 in. Inlet

Exhaust Tubing Diameter:

3 Inch

GTIN Code:

700042015009

$86.95

/pair

$94.95

-11%

Flowmaster |

#378842548

Flowmaster 842548 Stainless Super 44 Series Muffler, 2.50 In/Out

Muffler Type:

Chambered

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$139.95

/each

$157.95

-7%

Flowmaster |

#425817934

Flowmaster 817934 American Thunder Exhaust, 67-72 Ford Truck

Exhaust System Type:

Crossmember-Back

Single or Dual:

Dual

Bed Side Type:

Long

$799.95

/kit

$863.95

-7%

Flowmaster |

#378817725

Flowmaster 817725 American Thunder Cat-Back Exhaust System

Exhaust System Type:

Cat-Back

Single or Dual:

Single | Dual Exit

Exhaust Tubing Diameter:

2-1/2 Inch

$1,171.95

/kit

$1,267.95

-11%

Flowmaster |

#378852546

Flowmaster 852546 Super 40 Series Delta Flow Muffler, 2.50 In/Out

Muffler Type:

Chambered

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$170.95

/each

$192.95

-7%

Flowmaster |

#37817233

Flowmaster 17233 American Thunder Cat-Back Exhaust System, Camaro

Exhaust System Type:

Cat-Back

Single or Dual:

Single | Dual Exit

Exhaust Tubing Diameter:

3 Inch

$779.95

/kit

$843.95

-8%

Flowmaster |

#37815920

Flowmaster 15920 Exhaust Crossover Pipe, 2.5 in. Diameter

Exhaust Tubing Diameter:

2-1/2 Inch

GTIN Code:

700042014705

$136.95

/kit

$148.95

-11%

Flowmaster |

#378953046

Flowmaster 953046 Super 40 3 In. Muffler, Offset Inlet-Centered Outlet

Muffler Type:

Chambered

Inlet Diameter:

Outlet Diameter:

$149.95

/each

$168.95

-11%

Flowmaster |

#37852555

Flowmaster 52555 50 Series Muffler, 2.50 In/Out

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$204.95

/each

$230.95

-7%

Flowmaster |

#37815930FM

Flowmaster 15930FM Header Collector Ball Flange Kit, 3 In to 3 In

GTIN Code:

700042018659

$207.95

/each

$224.95

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Flowmaster Headers and Exhaust

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Products

Flowmaster 817471 American Thunder Cat-Back Exhaust System

Flowmaster 842580 80 Series Crossflow Muffler, 2.50 In/Out

Flowmaster 15362 Exhaust Tip, 2.5 in. Inlet, 13 in. Long

Flowmaster 943050 50 Series Delta Flow Muffler, 3.00 In/Out

Flowmaster 81055 Pipe Kit, 2.5in. Impala

Related Articles

Flowmaster 942041 40 Series Delta Flow Muffler, 2.00 In/Out

Flowmaster 942451 50 Series Delta Flow Muffler, 2.25 In/Out

Flowmaster 15938 Ball Flange 2-1/2 Inch Collector to 2.5 Inch

Flowmaster 524554 50 Series Muffler, 2.25 In/Out

Flowmaster 717847 FlowFX Direct-Fit Muffler, 2019 Ram 1500 5.7L

Flowmaster 81073 Manifold Downpipes, Pontiac

Flowmaster 17165 Force II Cat-Back Exhaust System, 96-99 GM SUV

Flowmaster 817492 Force II Cat-Back Exhaust System

Flowmaster 818147 Force II Cat-Back Exhaust 15-20 F-150 2.7/3.5/5

Flowmaster 843016 Super 10 Series Muffler, 3.00 In/Out

Flowmaster 17435 American Thunder Exhaust Kit, 1996-06 GM Truck

Flowmaster 17126 Force II Cat-Back Exhaust System, 88-92 GM Truck

Flowmaster 717787 FlowFX Cat-Back Exhaust System, 2014-19 GM 1500

Flowmaster 814123 Scavenger Series Elite Header 2002-13 GM Truck

Flowmaster 717785 FlowFX Cat-Back Exhaust System, 2015-19 F-150

Flowmaster MB125048 Exhaust Pipes, 2.50 in. O.D x 48in

Flowmaster 817757 Force II Cat-Back, 2017-19 F-250/F-350, 6.2L

Flowmaster 717831 FlowFX Dual Exit Cat-Back Exhaust System

Flowmaster 8042543 Stainless 40 Series Muffler, 2.50 In/Out

Flowmaster 15430 Outlaw Series Race Muffler, 3.00 In/Out

Flowmaster 942549 Super 44 Series Muffler, 2.50 In/Out

Flowmaster T3030 Scavenger Turndown, 3 in. Inlet

Flowmaster 842548 Stainless Super 44 Series Muffler, 2.50 In/Out

Flowmaster 817934 American Thunder Exhaust, 67-72 Ford Truck

Flowmaster 817725 American Thunder Cat-Back Exhaust System

Flowmaster 852546 Super 40 Series Delta Flow Muffler, 2.50 In/Out

Flowmaster 17233 American Thunder Cat-Back Exhaust System, Camaro

Flowmaster 15920 Exhaust Crossover Pipe, 2.5 in. Diameter

Flowmaster 953046 Super 40 3 In. Muffler, Offset Inlet-Centered Outlet

Flowmaster 52555 50 Series Muffler, 2.50 In/Out

Flowmaster 15930FM Header Collector Ball Flange Kit, 3 In to 3 In

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