Flowmaster Street Headers and Exhaust Parts

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-11%

Flowmaster |

#378942552

Flowmaster 942552 50 Series Delta Flow Muffler, 2.50 In/Out

Muffler Type:

Chambered

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$173.95

/each

$195.95

-8%

Flowmaster |

#37817104

Flowmaster 17104 American Thunder Exhaust Kit, 1967-74 Camaro/FB

Exhaust System Type:

Header-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

2-1/2 Inch

$949.95

/kit

$1,037.95

-9%

Flowmaster |

#37842541

Flowmaster 42541 2-1/2 Inch Muffler, Offset Inlet/Centered Outlet

(1)

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$101.95

/each

$112.95

-11%

Flowmaster |

#378124184

Flowmaster 12418409 Hushpower II 409 Muffler 2.25 Inch ID 18 Inch

(3)

Inlet Diameter:

2.25"

Outlet Diameter:

2.25"

$199.95

/each

$224.95

-8%

Flowmaster |

#378817129

Flowmaster 817129 American Thunder Crossmember-Back, 67-68 Camaro

(1)

Exhaust System Type:

Header-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

2-1/2 Inch

$999.95

/kit

$1,094.95

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.

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.

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.

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.

Speedway Roadster Headers for a 305 Trike

In this Tech Tip, a customer asked about using a set of Small Block Chevy Sprint Roadster headers for his trike, powered by a stock 305.

Hooker Header Installation Guide

Hooker headers are installed in a 1967 Pontiac Firebird for increased power and a boost in performance. See how to work through fitment of the steering box, clutch Z bar and starter.

Project Chevelle Episode 12: Exhaust

In this episode we install a Flowmaster American Thunder dual exhaust kit behind our healthy 383 and go for a spin. Spoiler alert; it sounds awesome!

-7%

Flowmaster |

#37817107

Flowmaster 17107 Header-back System, 64-72 Chevelle

Exhaust System Type:

Header-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

2-1/2 Inch

$584.95

/kit

$633.95

-7%

Flowmaster |

#37881071

Flowmaster 81071 Pipe Kit, Chevy, 2.50 in. O.D.

(1)

Exhaust Tubing Diameter:

2-1/2 Inch

Finish:

Natural

Hardware Included:

Yes

$259.95

/kit

$281.95

-7%

Flowmaster |

#378817390

Flowmaster 817390 American Thunder Exhaust Kit, 1968-70 Mopar B-Body

Exhaust System Type:

Header-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

2-1/2 Inch

$1,117.95

/kit

$1,210.95

-7%

Flowmaster |

#378817409

Flowmaster 817409 American Thunder Exhaust Kit, 1968-72 GM A-Body

Exhaust System Type:

Header-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

2-1/2 Inch

$1,117.95

/kit

$1,210.95

-7%

Flowmaster |

#42515823

Flowmaster 15823 1962-74 MOPAR B-Body 3 Inch Pre-Bent Tailpipes

Outside Diameter:

3.00"

Exhaust Tubing Diameter:

3 Inch

Finish:

Aluminized

$311.95

/kit

$337.95

-6%

Flowmaster |

#37815935

Flowmaster 15935 U-Fit Dual Exhaust Kit, Universal, 2-1/4 Inch

Exhaust System Type:

Header-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

2-1/4 Inch

$699.95

/each

$749.95

-7%

Flowmaster |

#37815361

Flowmaster 15361 Exhaust Tip, 2.5 in. Inlet, 12 in. Long

Exhaust Tubing Diameter:

2-1/2 Inch

Finish:

Polished

$92.19

/each

$99.95

-11%

Flowmaster |

#378952546

Flowmaster 952546 Super 40 Muffler-Offset Inlet-Centered Outlet, 2-1/2

(2)

Muffler Type:

Chambered

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$149.95

/each

$168.95

-7%

Flowmaster |

#37815818

Flowmaster 15818 Tailpipes, 3in Pair 68-72 GM

Outside Diameter:

3.00"

Exhaust Tubing Diameter:

3 Inch

Finish:

Aluminized

$288.95

/kit

$312.95

-11%

Flowmaster |

#378943046

Flowmaster 943046 Super 44 3 In. Muffler, Offset Inlet-Centered Outlet

(2)

Muffler Type:

Chambered

Inlet Diameter:

Outlet Diameter:

$137.95

/each

$155.95

-11%

Flowmaster |

#378842515

Flowmaster 842515 Super 10 Series Muffler, 2.50 In/Out

Muffler Type:

Chambered

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$101.95

/each

$114.95

-9%

Flowmaster |

#378425403

Flowmaster 425403 40 Series Muffler 2.50 Dual In, 3.00 Center Out

(1)

Inlet Diameter:

2.5"

Outlet Diameter:

$101.95

/each

$112.95

-7%

Flowmaster |

#37815819

Flowmaster 15819 Tailpipes, 3in Pair 64-67 GM

Outside Diameter:

3.00"

Exhaust Tubing Diameter:

3 Inch

Finish:

Aluminized

$259.95

/kit

$281.95

-11%

Flowmaster |

#378124124

Flowmaster 12412409 Huspower II Muffler 2.25 Inch 12 Inch Case

(1)

Inlet Diameter:

2.25"

Outlet Diameter:

2.25"

$169.95

/each

$191.95

-6%

Flowmaster |

#37815802

Flowmaster 15802 Tailpipes, 2.5in Pair GM A-Body

Outside Diameter:

2.50"

Exhaust Tubing Diameter:

2-1/2 Inch

Finish:

Aluminized

$249.95

/kit

$267.95

-11%

Flowmaster |

#378952545

Flowmaster 952545 Super 40 Series Delta Flow Muffler, 2.50 In/Out

Muffler Type:

Chambered

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$149.95

/each

$168.95

-8%

Flowmaster |

#378817654

Flowmaster 817654 American Thunder Exhaust Kit, 1967-72 GM Pickup

Exhaust System Type:

Header-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

2-1/2 Inch

$999.95

/kit

$1,094.95

-9%

Flowmaster |

#37843043

Flowmaster Mufflers 43043 40 Series Muffler, Offset Inlet/Outlet, 3 In

(1)

Muffler Type:

Reflection

Inlet Diameter:

Outlet Diameter:

$101.95

/each

$112.95

-7%

Flowmaster |

#3781041

Flowmaster 1041 Pipe Kit, 64-72 GM 3in Header back

Exhaust System Type:

Header-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

3 Inch

$584.95

/kit

$633.95

-8%

Flowmaster |

#37817281

Flowmaster 17281 American Thunder Exhaust Kit, 1967-70 Mustang

Exhaust System Type:

Header-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

2-1/2 Inch

$899.95

/kit

$979.95

-11%

Flowmaster |

#378943048

Flowmaster Mufflers 943048 Super 44 Muffler, Offset Inlet/Outlet, 3 In

Muffler Type:

Chambered

Inlet Diameter:

Outlet Diameter:

$137.95

/each

$155.95

-8%

Flowmaster |

#425817938

Flowmaster 817938 American Thunder Exhaust Kit, 67-72 Ford Truck

Exhaust System Type:

Crossmember-Back

Single or Dual:

Dual

Bed Side Type:

Short & Long

$899.95

/kit

$979.95

-6%

Flowmaster |

#37815803

Flowmaster 15803 Tailpipes, 2.5in Pair 73-87 GM P/Up

(2)

Outside Diameter:

2.50"

Exhaust Tubing Diameter:

2-1/2 Inch

Finish:

Aluminized

$249.95

/kit

$267.95

-5%

Flowmaster |

#378817673

Flowmaster 817673 American Thunder Exhaust Kit, 1962-67 Nova

Exhaust System Type:

Crossmember-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

2-1/2 Inch

$1,249.95

/kit

$1,325.95

-5%

Flowmaster |

#37817382

Flowmaster 17382 Delta Force Exhaust Kit, 1968-70 Mopar B-Body

Exhaust System Type:

Header-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

3 Inch

$1,249.95

/kit

$1,325.95

-6%

Flowmaster |

#37881072

Flowmaster 81072 Pipe Kit, Chevy, 2.50 in. O.D.

Exhaust Tubing Diameter:

2-1/2 Inch

Hardware Included:

$249.95

/kit

$266.95

-7%

Flowmaster |

#378817413

Flowmaster 817413 Stainless American Thunder Exhaust 59-64 Impala

Exhaust System Type:

Header-Back

Single or Dual:

Dual

Exhaust Tubing Diameter:

2-1/2 Inch

$727.95

/kit

$787.95

-9%

Flowmaster |

#37842441

Flowmaster 42441 2-1/4 Inch Muffler, Offset Inlet/Centered Outlet

(1)

Inlet Diameter:

2.25"

Outlet Diameter:

2.25"

$101.95

/each

$112.95

-11%

Flowmaster |

#378953048

Flowmaster Mufflers 953048 Super 40 Muffler, Offset Inlet/Outlet, 3 In

(1)

Muffler Type:

Chambered

Inlet Diameter:

Outlet Diameter:

$149.95

/each

$168.95

-5%

Flowmaster |

#42515826

Flowmaster 15826 1963-74 MOPAR A-Body 2.5 Inch Pre-Bent Tailpipes

Outside Diameter:

2.50"

Exhaust Tubing Diameter:

2-1/2 Inch

Finish:

Aluminized

$299.95

/kit

$317.95

-11%

Flowmaster |

#378842553

Flowmaster 842553 50 Series Delta Flow Muffler, 2.50 In/Out

Muffler Type:

Chambered

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$188.95

/each

$212.95

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Flowmaster Street Headers and Exhaust Parts

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Products

Flowmaster 942552 50 Series Delta Flow Muffler, 2.50 In/Out

Flowmaster 17104 American Thunder Exhaust Kit, 1967-74 Camaro/FB

Flowmaster 42541 2-1/2 Inch Muffler, Offset Inlet/Centered Outlet

Flowmaster 12418409 Hushpower II 409 Muffler 2.25 Inch ID 18 Inch

Flowmaster 817129 American Thunder Crossmember-Back, 67-68 Camaro

Related Articles

Flowmaster 17107 Header-back System, 64-72 Chevelle

Flowmaster 81071 Pipe Kit, Chevy, 2.50 in. O.D.

Flowmaster 817390 American Thunder Exhaust Kit, 1968-70 Mopar B-Body

Flowmaster 817409 American Thunder Exhaust Kit, 1968-72 GM A-Body

Flowmaster 15823 1962-74 MOPAR B-Body 3 Inch Pre-Bent Tailpipes

Flowmaster 15935 U-Fit Dual Exhaust Kit, Universal, 2-1/4 Inch

Flowmaster 15361 Exhaust Tip, 2.5 in. Inlet, 12 in. Long

Flowmaster 952546 Super 40 Muffler-Offset Inlet-Centered Outlet, 2-1/2

Flowmaster 15818 Tailpipes, 3in Pair 68-72 GM

Flowmaster 943046 Super 44 3 In. Muffler, Offset Inlet-Centered Outlet

Flowmaster 842515 Super 10 Series Muffler, 2.50 In/Out

Flowmaster 425403 40 Series Muffler 2.50 Dual In, 3.00 Center Out

Flowmaster 15819 Tailpipes, 3in Pair 64-67 GM

Flowmaster 12412409 Huspower II Muffler 2.25 Inch 12 Inch Case

Flowmaster 15802 Tailpipes, 2.5in Pair GM A-Body

Flowmaster 952545 Super 40 Series Delta Flow Muffler, 2.50 In/Out

Flowmaster 817654 American Thunder Exhaust Kit, 1967-72 GM Pickup

Flowmaster Mufflers 43043 40 Series Muffler, Offset Inlet/Outlet, 3 In

Flowmaster 1041 Pipe Kit, 64-72 GM 3in Header back

Flowmaster 17281 American Thunder Exhaust Kit, 1967-70 Mustang

Flowmaster Mufflers 943048 Super 44 Muffler, Offset Inlet/Outlet, 3 In

Flowmaster 817938 American Thunder Exhaust Kit, 67-72 Ford Truck

Flowmaster 15803 Tailpipes, 2.5in Pair 73-87 GM P/Up

Flowmaster 817673 American Thunder Exhaust Kit, 1962-67 Nova

Flowmaster 17382 Delta Force Exhaust Kit, 1968-70 Mopar B-Body

Flowmaster 81072 Pipe Kit, Chevy, 2.50 in. O.D.

Flowmaster 817413 Stainless American Thunder Exhaust 59-64 Impala

Flowmaster 42441 2-1/4 Inch Muffler, Offset Inlet/Centered Outlet

Flowmaster Mufflers 953048 Super 40 Muffler, Offset Inlet/Outlet, 3 In

Flowmaster 15826 1963-74 MOPAR A-Body 2.5 Inch Pre-Bent Tailpipes

Flowmaster 842553 50 Series Delta Flow Muffler, 2.50 In/Out

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