1981 GMC K2500 Headers and Exhaust Parts

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1981 GMC K2500

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1981 GMC K2500

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-12%

Porter Muffler |

#9105012

Porter Muffler PM40225 Standard Muffler, 2.25 Inch Inlet/Outlet

(2)

Muffler Type:

Straight-Through

Inlet Diameter:

2.25"

Outlet Diameter:

2.25"

$117.99

/each

$134.95

EXtreme 3-1/2 Inch 4-Bolt Lake Style Header Cap Gaskets

Speedway Motors |

#91013546

EXtreme 3-1/2 Inch 4-Bolt Lake Style Header Cap Gaskets

(2)

Overall Thickness:

.085"

Inside Diameter:

3.5"

Collector Diameter:

3-1/2 Inch

$7.49

/pair

Spectre Performance |

#4654642

Spectre 4642 Header Reducer Kit, 2-1/2 Inlet, 2-1/4 Inch Outlet, Pair

(2)

Material Type:

Steel

Flange Style:

3-Bolt

$34.99

/pair

Mild Steel Exhaust Pipe Mandrel Bend, 180 Degree, 2-1/2 Inch

Speedway Motors |

#91013881

Mild Steel Exhaust Pipe Mandrel Bend, 180 Degree, 2-1/2 Inch

(7)

Exhaust Tubing Diameter:

2-1/2 Inch

Exhaust Pipe Type:

Custom Tubing

Outside Diameter:

2.50"

$32.99

/each

Stainless Steel 2 Inch Bullet Glasspack Mufflers, 18" Case

Speedway Motors |

#91013113

Stainless Steel 2 Inch Bullet Glasspack Mufflers, 18" Case

(5)

Muffler Type:

Glass Pack

Inlet Diameter:

Outlet Diameter:

as low as

$157.99

/each

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.

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.

Exhaust Repair

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

Speedway Tech Talk - Derby Car Headers

Jeremy explains the different options of headers that Speedway Motors offers for Demolition Derby cars. Watch this video to see a variety of options and the benefits of certain headers.

Replacing GM Rear End Spherical Bushings

In this budget build, a GM rear end is upgraded in order to hold 400+ HP. See how spherical bushings are replaced in a used 8.5” GM 10 bolt rear end.

Rebuilding Junkyard SBC Vortec Cylinder Heads

Learn how to re-build a junkyard Small Block Chevy. A step-by-step guide on how to select a SBC, machine the valve guide bosses down, and what parts to use to upgrade to your personal liking.

-9%

Patriot Exhaust |

#91013331

Patriot Exhaust Short Steel Megaphones, 2 x 4 x 12 Inch

(4)

Overall Length:

12.00"

Exhaust Tubing Diameter:

2 Inch

Sold in Quantity:

Each

$51.03

/each

$56.13

-21%

Vibrant |

#32113800

Vibrant 321 Stainless Steel 180 Degree Mandrel Bends

Material Type:

Stainless Steel

Exhaust Pipe Type:

Custom Tubing

as low as

$62.99

/each

$79.99

-33%

MagnaFlow |

#37610168

MagnaFlow 10168 2.5 In Performance Exhaust Stainless V-Band Clamp

Exhaust Clamp Type:

V-Band

Inside Diameter:

2.5"

$98.00

/each

$148.32

Stainless Steel Chamber Muffler, 3 Inch, Offset/Offset

Speedway Motors |

#9302008

Stainless Steel Chamber Muffler, 3 Inch, Offset/Offset

(3)

Muffler Type:

Chambered

Inlet Diameter:

Outlet Diameter:

$86.99

/each

Mild Steel Combo Exhaust Bend, 3-1/2-inch

Speedway Motors |

#91013911

Mild Steel Combo Exhaust Bend, 3-1/2-inch

Exhaust Tubing Diameter:

3-1/2 Inch

Exhaust Pipe Type:

Custom Tubing

Outside Diameter:

3.50"

$51.99

/each

-9%

Flowmaster |

#378843015

Flowmaster 843015 Super 10 Series Muffler, 3.00 In/Out

Muffler Type:

Chambered

Inlet Diameter:

Outlet Diameter:

$101.95

/each

$112.95

Stainless Steel Combo Exhaust Bend, 3-1/2-inch

Speedway Motors |

#91013921

Stainless Steel Combo Exhaust Bend, 3-1/2-inch

Exhaust Tubing Diameter:

3-1/2 Inch

Exhaust Pipe Type:

Custom Tubing

Outside Diameter:

3.50"

$66.99

/each

Granatelli Motor Sports |

#36217525

Granatelli Motor Sports 307525K Weld In Exhaust Cutout Kit, 2.5

(2)

Exhaust Tubing Diameter:

2-1/2 Inch

Finish:

Raw

Inlet Diameter (Fraction):

2-1/2"

$395.92

/each

-9%

JBA 1650ST Stainless Steel 1650 Starter Tubes

JBA Headers |

#4471650ST

JBA 1650ST Stainless Steel 1650 Starter Tubes

(3)

Sold in Quantity:

Pair

Flange Style:

2-Bolt

$70.28

/set

$77.31

-33%

MagnaFlow |

#37611226

MagnaFlow 11226 4x9 Inch Oval Center/Offset Stainless Muffler

(1)

Muffler Type:

Straight-Through

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$130.00

/each

$196.64

Speedway LS1 Header Kit, 1-7/8 Inch Tube

Speedway Motors |

#41869511

Speedway LS1 Header Kit, 1-7/8 Inch Tube

(3)

Header Tube Type:

Roadster

Exhaust Port Shape:

Round

Flange Style:

Standard

$297.99

/each

-9%

Patriot Exhaust |

#447H7180

Patriot Exhaust H7180 U-Clamp, 2-1/2 Inch

Exhaust Clamp Type:

Saddle/U-Bolt

Inside Diameter:

2.5"

$7.09

/each

$7.80

-10%

Borla |

#21540842S

Borla® 40842S S-Type Muffler, Round, 2.5 Inch Inlet/Outlet

Muffler Type:

Straight-Through

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$193.99

/each

$216.99

Stainless Steel Exhaust Bend, 30 Degree, Long, 3 Inch O.D.

Speedway Motors |

#91013937

Stainless Steel Exhaust Bend, 30 Degree, Long, 3 Inch O.D.

Exhaust Tubing Diameter:

3 Inch

Exhaust Pipe Type:

Elbow/Connector

Outside Diameter:

3.00"

$41.99

/each

-9%

Patriot Exhaust |

#447H6937

Patriot Exhaust H6937 304 SS Exhaust Pipe U-Bends, 2-1/2 Inch

Exhaust Tubing Diameter:

2-1/2 Inch

Exhaust Pipe Type:

Custom Tubing

Outside Diameter:

2.50"

$60.39

/each

$66.43

Speedway Motors |

#91013943

Mild Steel Exhaust U-Bend, 3 Inch

Exhaust Tubing Diameter:

3 Inch

Exhaust Pipe Type:

Custom Tubing

Outside Diameter:

3.00"

$32.99

/each

-9%

Doug's Headers |

#447DEC300ATD

Doug's Headers DEC300ATD Cut-Out Turn Down Tips, 3"", Stainless

(1)

Exhaust Tubing Diameter:

3 Inch

Finish:

Raw

$64.12

/each

$70.53

-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

Schoenfeld |

#9173580

Schoenfeld 3580 Steel Exhaust Elbow, 80 Degree, 3.5 Inch

(1)

Exhaust Tubing Diameter:

3-1/2 Inch

Exhaust Pipe Type:

Elbow/Connector

Outside Diameter:

3.50"

$26.95

/each

-10%

Powerbuilt |

#372940538

Powerbuilt 940538 Exhaust Pipe Cutting Tool, 3-1/2 - 6 Inch

GTIN Code:

028907317151

Sold in Quantity:

Each

$85.99

/each

$95.99

Speedway Header and Exhaust Wrap, 1 Inch x 50 Ft, White Color

Speedway Motors |

#91013800

Speedway Header and Exhaust Wrap, 1 Inch x 50 Ft, White Color

(3)

Color:

White

Sold in Quantity:

Each

$11.49

/each

Mild Steel Exhaust Bend, 30-Degree, Long, 2-1/4-inch O.D.

Speedway Motors |

#91013933

Mild Steel Exhaust Bend, 30-Degree, Long, 2-1/4-inch O.D.

Exhaust Tubing Diameter:

2-1/4 Inch

Exhaust Pipe Type:

Elbow/Connector

Outside Diameter:

2.25"

$26.99

/each

Speedway Motors |

#91013839

Header Collector, 1 7/8 Inch Primaries

(2)

Material Type:

Steel

Finish:

Natural

Sold in Quantity:

Each

$34.99

/each

-9%

Patriot Exhaust |

#447H1505

Patriot Exhaust H1505 Exhaust Tip Slash Cut Chrome

(1)

Exhaust Tubing Diameter:

2-1/2 Inch

Finish:

Chrome

$27.43

/each

$30.17

-25%

Vibrant |

#32113810

Vibrant 321 Stainless Steel 90° Mandrel Bends

Material Type:

Stainless Steel

Exhaust Pipe Type:

Custom Tubing

$42.99

/each

$57.99

-9%

Patriot Exhaust |

#447H7755

Patriot Exhaust H7755 Tubing, Mild Steel, 1-7/8 Inch, 16 Gauge

(1)

Exhaust Tubing Diameter:

1-7/8 Inch

Exhaust Pipe Type:

Custom Tubing

Outside Diameter:

1.88"

$49.37

/each

$54.31

-9%

Patriot Exhaust |

#447H6951

Patriot Exhaust H6951 304 SS Exhaust Pipe, 45 Degree Bends 2-1/2 Inch

(1)

Exhaust Tubing Diameter:

2-1/2 Inch

Exhaust Pipe Type:

Elbow/Connector

Outside Diameter:

2.50"

$39.49

/each

$43.44

-9%

Patriot Exhaust |

#447H7751

Patriot Exhaust H7751 Tubing, Mild Steel, 1-5/8 Inch, 16 Gauge

Exhaust Tubing Diameter:

1-5/8 Inch

Exhaust Pipe Type:

Custom Tubing

Outside Diameter:

1.625"

$38.40

/each

$42.24

-10%

Borla |

#21540352

Borla® 40352 ProXS™ Muffler, 2.5 Offset Inlet/Outlet

(1)

Muffler Type:

Straight-Through

Inlet Diameter:

2.5"

Outlet Diameter:

2.5"

$132.99

/each

$147.99

Replacement Fiberglass Packing Material for Insert Mufflers

Patriot Exhaust |

#9303846

Replacement Fiberglass Packing Material for Insert Mufflers

(6)

Overall Width:

15"

Overall Height:

.500"

$13.49

/each

DEi 010122 Exhaust Pipe Wrap and Locking Ties Kit, 2 Inch x 25 Ft, Tan

DEI |

#35610122

DEi 010122 Exhaust Pipe Wrap and Locking Ties Kit, 2 Inch x 25 Ft, Tan

(7)

Overall Width:

2.00"

Sold in Quantity:

Each

$29.99

/each

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1981 GMC K2500 Headers and Exhaust Parts

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Part

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Products

Porter Muffler PM40225 Standard Muffler, 2.25 Inch Inlet/Outlet

EXtreme 3-1/2 Inch 4-Bolt Lake Style Header Cap Gaskets

Spectre 4642 Header Reducer Kit, 2-1/2 Inlet, 2-1/4 Inch Outlet, Pair

Mild Steel Exhaust Pipe Mandrel Bend, 180 Degree, 2-1/2 Inch

Stainless Steel 2 Inch Bullet Glasspack Mufflers, 18" Case

Related Articles

Patriot Exhaust Short Steel Megaphones, 2 x 4 x 12 Inch

Vibrant 321 Stainless Steel 180 Degree Mandrel Bends

MagnaFlow 10168 2.5 In Performance Exhaust Stainless V-Band Clamp

Stainless Steel Chamber Muffler, 3 Inch, Offset/Offset

Mild Steel Combo Exhaust Bend, 3-1/2-inch

Flowmaster 843015 Super 10 Series Muffler, 3.00 In/Out

Stainless Steel Combo Exhaust Bend, 3-1/2-inch

Granatelli Motor Sports 307525K Weld In Exhaust Cutout Kit, 2.5

JBA 1650ST Stainless Steel 1650 Starter Tubes

MagnaFlow 11226 4x9 Inch Oval Center/Offset Stainless Muffler

Speedway LS1 Header Kit, 1-7/8 Inch Tube

Patriot Exhaust H7180 U-Clamp, 2-1/2 Inch

Borla® 40842S S-Type Muffler, Round, 2.5 Inch Inlet/Outlet

Stainless Steel Exhaust Bend, 30 Degree, Long, 3 Inch O.D.

Patriot Exhaust H6937 304 SS Exhaust Pipe U-Bends, 2-1/2 Inch

Mild Steel Exhaust U-Bend, 3 Inch

Doug's Headers DEC300ATD Cut-Out Turn Down Tips, 3"", Stainless

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

Schoenfeld 3580 Steel Exhaust Elbow, 80 Degree, 3.5 Inch

Powerbuilt 940538 Exhaust Pipe Cutting Tool, 3-1/2 - 6 Inch

Speedway Header and Exhaust Wrap, 1 Inch x 50 Ft, White Color

Mild Steel Exhaust Bend, 30-Degree, Long, 2-1/4-inch O.D.

Header Collector, 1 7/8 Inch Primaries

Patriot Exhaust H1505 Exhaust Tip Slash Cut Chrome

Vibrant 321 Stainless Steel 90° Mandrel Bends

Patriot Exhaust H7755 Tubing, Mild Steel, 1-7/8 Inch, 16 Gauge

Patriot Exhaust H6951 304 SS Exhaust Pipe, 45 Degree Bends 2-1/2 Inch

Patriot Exhaust H7751 Tubing, Mild Steel, 1-5/8 Inch, 16 Gauge

Borla® 40352 ProXS™ Muffler, 2.5 Offset Inlet/Outlet

Replacement Fiberglass Packing Material for Insert Mufflers

DEi 010122 Exhaust Pipe Wrap and Locking Ties Kit, 2 Inch x 25 Ft, Tan