GMC K25 Radiators and Components

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GMC K25

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AFCO |

#10680128X10AN

AFCO 80128X-10AN -10 AN Female O-Ring Weld-On Style Bung Fitting

AN Size:

-10 AN

Thread Type:

RH Female

Fitting Attachment 1:

Female Threads

$18.49

/each

AFCO |

#10680128X5

AFCO 80128X5 Aluminum Weld-On Female Fitting, 1/4 Inch NPT Thread

(1)

Thread Pitch:

1/4" NPT Female

Material Type:

Aluminum

Finish:

Natural

$18.99

/each

AFCO |

#10680128X11

AFCO 80128X11 Aluminum Weld-On Female Fitting, 1/2 Inch NPT Thread

Thread Pitch:

1/2" NPT Female

Material Type:

Aluminum

Finish:

Natural

$18.99

/each

AFCO |

#10680128X9

AFCO 80128X9 Weld-on Male Fitting, -16 AN

AN Size:

-16 AN

Thread Type:

RH Male

Fitting Attachment 1:

Male Threads

$23.99

/each

Black Straight -4 AN Flare to 1/4 Inch NPT Pipe Adapter Fitting

Speedway Motors |

#61760431

Black Straight -4 AN Flare to 1/4 Inch NPT Pipe Adapter Fitting

(2)

Fitting End A:

-4 AN Male

Fitting End B:

1/4" NPT Male

Angle:

Straight

$10.99

/each

Model A Radiator Mounting

Learn about Model A radiator mounting. Speedway employee Tim is installing a 1932 Ford radiator on his roadster. Follow his step by step installation guide.

Car Cooling System Components

How does a cooling system work? Why is your engine overheating? What parts should you be giving your attention to? This guide answers all your questions.

Braking Components - Selection and Design

Looking for a performance or custom brake set-up? Whether you're replacing components or building your brakes from scratch, you may wonder what size master cylinder or booster to use. No need to worry, just follow our handy guide.

Putting a 32 Radiator in a 29 Roadster

Tim talks about the process of adapting a full size 1932 Ford Radiator to fit in his 1929 Ford Roadster project.

Installing Radiator Support Rods

We all need a little help from time to time. In this case, we had a grill shell on a 1946 Chevrolet Truck that could use some stiffening. Ride along as Heath installs support rods and rod brackets.

New Product Spotlight - 4th Quarter 2025 - Parts to Fuel Your Passion

Speedway Motors, a manufacturer, retailer and distributor of high-quality automotive parts and racing products, announced today new products now available on their website.

Disassembling Valvetrain Components

Rebuilding an engine? Stay organized by using a valvetrain rocker arm organizer tray while disassembling the valvetrain components. Learn some tips on why you shouldn't mix up lifters if you intend on using them again.

How to Install an External Transmission Cooler

Learn how to install an external Transmission Cooler, to help keep the temperature of your transmission consistent.

GM Steering Column Compatibility, Interchange & Repair Guide

Learn more about GM steering column identification, GM steering column lengths, and GM steering column compatibility.

How to Install Side Detent Shifter for GM TH200, TH250, TH350, and TH400

Learn how to install a side detent shifter in a 1969 Chevy C10.

Speedway Motors |

#91015607

Hex Brass Radiator Cap, 7 lbs

(2)

Pressure Rating:

7 psi

Sold in Quantity:

Each

$16.99

/each

Black 45 Degree -4 AN Flare to 1/8 Inch NPT Pipe Adapter Fitting

Speedway Motors |

#61760941

Black 45 Degree -4 AN Flare to 1/8 Inch NPT Pipe Adapter Fitting

Fitting End A:

-4 AN Male

Fitting End B:

1/8" NPT Male

Angle:

45 degree

$10.99

/each

Black 45 Degree -6 AN Flare to 1/4 Inch NPT Pipe Adapter Fitting

Speedway Motors |

#61760951

Black 45 Degree -6 AN Flare to 1/4 Inch NPT Pipe Adapter Fitting

(1)

Fitting End A:

-6 AN Male

Fitting End B:

1/4" NPT Male

Angle:

45 degree

$11.99

/each

Black 45 Degree -12 AN Flare to 3/4 Inch NPT Pipe Adapter Fitting

Speedway Motors |

#61760981

Black 45 Degree -12 AN Flare to 3/4 Inch NPT Pipe Adapter Fitting

(1)

Fitting End A:

-12 AN Male

Fitting End B:

3/4" NPT Male

Angle:

45 degree

$25.99

/each

Black 90 Degree -8 AN Flare to 1/2 Inch NPT Pipe Adapter Fitting

Speedway Motors |

#61760871

Black 90 Degree -8 AN Flare to 1/2 Inch NPT Pipe Adapter Fitting

(1)

Fitting End A:

-8 AN Male

Fitting End B:

1/2" NPT Male

Angle:

90 degree

$27.99

/each

Male Aluminum 37 Degree AN Flare Weld Bung Fitting, -16 AN

Speedway Motors |

#6177216

Male Aluminum 37 Degree AN Flare Weld Bung Fitting, -16 AN

AN Size:

-16 AN

Thread Type:

RH Male

Fitting Attachment 1:

Male Threads

$17.99

/each

Quick Tight Hose Clamp, 1 Inch to 1-1/2 Inch

Speedway Motors |

#91015761

Quick Tight Hose Clamp, 1 Inch to 1-1/2 Inch

(1)

Style:

Worm Gear

Material Type:

Stainless Steel

Color:

Natural

$3.09

/each

-41%

Fragola |

#6179520

Fragola 495020 Pressure Fitting 1/8 Inch Female to AN3 Male - Blue

(2)

Fitting End A:

-3 AN Male

Fitting End B:

1/8" NPT Female

Angle:

Straight

$4.99

/each

$8.52

-17%

90 Degree Flare Adaptor, AN12 to 1/2 Inch NPT

Speedway Motors |

#6176090

90 Degree Flare Adaptor, AN12 to 1/2 Inch NPT

(1)

Fitting End A:

-12 AN Male

Fitting End B:

1/2" NPT Male

Angle:

90 degree

$27.99

/each

$34.04

AFCO |

#10685258

AFCO 85258 Brass Gauge Fitting Adapter, 1/8 Inch Male Pipe to -4 AN

Fitting End A:

-4 AN Male

Fitting End B:

1/8" NPT Male

Angle:

Straight

$9.99

/each

AFCO |

#1066680004

Afco 6680004 Aluminum Straight Brake Fitting, 1/8 Inch NPT Male, -4 AN

Fitting End A:

-4 AN Male

Fitting End B:

1/8" NPT Male

Angle:

Straight

$12.99

/each

Steel Adapter Fitting, 1/8 Inch Male to 1/4 Inch Male NPT

Speedway Motors |

#6175404

Steel Adapter Fitting, 1/8 Inch Male to 1/4 Inch Male NPT

Fitting End A:

1/4" NPT Male

Fitting End B:

1/8" NPT Male

Angle:

Straight

$5.49

/each

90 Degree Flare Adapter Elbow Fitting, -12 AN to 1/2 Inch NPT, Black

Speedway Motors |

#61760901

90 Degree Flare Adapter Elbow Fitting, -12 AN to 1/2 Inch NPT, Black

Fitting End A:

-12 AN Male

Fitting End B:

1/2" NPT Male

Angle:

90 degree

$29.99

/each

Threaded Male Pipe Nipple Coupler Fitting, 1/4 Inch NPT, Blue Anodized

Speedway Motors |

#6176151

Threaded Male Pipe Nipple Coupler Fitting, 1/4 Inch NPT, Blue Anodized

(1)

Fitting End A:

1/4" NPT Male

Fitting End B:

1/4" NPT Male

Angle:

Straight

$6.99

/each

Edelbrock |

#3258078

Edelbrock 8078 Brass Hose Fitting, 1 In. o/d x 3/4 In. NPT,SB Chrysler

Fitting End A:

1" Hose barb

Fitting End B:

3/4" NPT Male

Angle:

Straight

$19.95

/each

Spectre Performance |

#4658703

Spectre 8703 T-Bolt Intake Hose Clamp, Stainless Steel, 3 Inch, Each

Style:

T-Bolt

Material Type:

Stainless Steel

Color:

Natural

$9.99

/each

-7%

Earls |

#425981603ERL

Earls 981603ERL Blue Straight -3 AN Male to 1/8 Inch NPT Adapter

Fitting End A:

-3 AN Male

Fitting End B:

1/8" NPT Male

Angle:

Straight

$7.43

/each

$8.03

-7%

Earls |

#425981606ERL

Earls 981606ERL Blue Straight -6 AN Male to 1/4 Inch NPT Adapter

Fitting End A:

-6 AN Male

Fitting End B:

1/4" NPT Male

Angle:

Straight

$10.40

/each

$11.25

-7%

Earls |

#425981662ERL

Earls 981662ERL Blue Straight -6 AN Male to 1/8 Inch NPT Adapter

(1)

Fitting End A:

-6 AN Male

Fitting End B:

1/8" NPT Male

Angle:

Straight

$8.93

/each

$9.66

Stainless T-Bolt Clamp, 2-7/8 Inch Minimum Clamping Diameter

Speedway Motors |

#910553327

Stainless T-Bolt Clamp, 2-7/8 Inch Minimum Clamping Diameter

Style:

T-Bolt

Material Type:

Stainless Steel

Color:

Natural

$6.99

/each

Stainless T-Bolt Clamp, 3-1/8 Inch Minimum Clamping Diameter

Speedway Motors |

#910553328

Stainless T-Bolt Clamp, 3-1/8 Inch Minimum Clamping Diameter

Style:

T-Bolt

Material Type:

Stainless Steel

Color:

Natural

$7.59

/each

-7%

Earls |

#425981668ERL

Earls 981668ERL Blue Straight -6 AN Male to 1/2 Inch NPT Adapter

(1)

Fitting End A:

-6 AN Male

Fitting End B:

1/2" NPT Male

Angle:

Straight

$19.43

/each

$21.02

-7%

Earls |

#425900306ERL

Earls 900306ERL Chrome Fuel Line Hose Clamp, Econ-O-Fit Size 6

Style:

Worm Gear | Housing

Material Type:

Aluminum

Color:

Natural

$8.93

/each

$9.66

-7%

Earls |

#425922107ERL

Earls 922107ERL Blue 90 Degree -8 AN Male to 1/4 Inch NPT Male Swivel

Fitting End A:

-8 AN Male

Fitting End B:

1/4" NPT Male

Angle:

90 degree

$49.95

/each

$53.71

Ideal Heavy Duty T-Bolt Clamp, 1-1/2 Inch Minimum Clamping Diameter

Ideal Clamps |

#917150

Ideal Heavy Duty T-Bolt Clamp, 1-1/2 Inch Minimum Clamping Diameter

Style:

T-Bolt

Material Type:

Steel

Color:

Natural

$8.19

/each

-7%

Earls |

#425968704ERL

Earls 968704ERL -4AN to 1/8 Inch NPT Fuel Pressure Gauge Fitting

(1)

Fitting End A:

-4 AN Male

Fitting End B:

1/8" NPT Female

Angle:

Straight

$11.94

/each

$12.92

-8%

Mr Gasket |

#5509130G

Mr Gasket 9130G Coolant Overflow Tank, Stainless Steel, 2 x 13 Inch

GTIN Code:

084041191309

$134.95

/each

$146.95

-7%

Earls |

#425SS981603ERL

Earls SS981603ERL Straight -3 AN Male to 1/8 Inch NPT

(1)

Fitting End A:

-3 AN Male

Fitting End B:

1/8" NPT Male

Angle:

Straight

$17.58

/each

$19.01

Edelbrock |

#3258159

Edelbrock 8159 Pipe to Hose Barb Fitting, Straight, 1/2 in.NPT

Fitting End A:

5/8" Hose barb

Fitting End B:

1/2" NPT Male

Angle:

Straight

$21.95

/each

Edelbrock |

#3258168

Edelbrock 8168 Pipe to Hose Barb Fitting, 90 Deg, 3/8 in. NPT

(1)

Fitting End A:

3/8" Hose barb

Fitting End B:

3/8" NPT Male

Angle:

90 degree

$38.95

/each

-7%

Earls |

#425750010ERL

Earls 750010ERL Vapor Guard 1 Ear Type 3/8 Inch Hose Clamp 5/Pk

(1)

Style:

Crimp

Material Type:

Stainless Steel

Color:

Natural

$11.92

/set

$12.89

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GMC K25 Radiators and Components

Year

Part

Brand

Availability

Discounts

Engine Family

Price

Customer Rating

Products

AFCO 80128X-10AN -10 AN Female O-Ring Weld-On Style Bung Fitting

AFCO 80128X5 Aluminum Weld-On Female Fitting, 1/4 Inch NPT Thread

AFCO 80128X11 Aluminum Weld-On Female Fitting, 1/2 Inch NPT Thread

AFCO 80128X9 Weld-on Male Fitting, -16 AN

Black Straight -4 AN Flare to 1/4 Inch NPT Pipe Adapter Fitting

Related Articles

Hex Brass Radiator Cap, 7 lbs

Black 45 Degree -4 AN Flare to 1/8 Inch NPT Pipe Adapter Fitting

Black 45 Degree -6 AN Flare to 1/4 Inch NPT Pipe Adapter Fitting

Black 45 Degree -12 AN Flare to 3/4 Inch NPT Pipe Adapter Fitting

Black 90 Degree -8 AN Flare to 1/2 Inch NPT Pipe Adapter Fitting

Male Aluminum 37 Degree AN Flare Weld Bung Fitting, -16 AN

Quick Tight Hose Clamp, 1 Inch to 1-1/2 Inch

Fragola 495020 Pressure Fitting 1/8 Inch Female to AN3 Male - Blue

90 Degree Flare Adaptor, AN12 to 1/2 Inch NPT

AFCO 85258 Brass Gauge Fitting Adapter, 1/8 Inch Male Pipe to -4 AN

Afco 6680004 Aluminum Straight Brake Fitting, 1/8 Inch NPT Male, -4 AN

Steel Adapter Fitting, 1/8 Inch Male to 1/4 Inch Male NPT

90 Degree Flare Adapter Elbow Fitting, -12 AN to 1/2 Inch NPT, Black

Threaded Male Pipe Nipple Coupler Fitting, 1/4 Inch NPT, Blue Anodized

Edelbrock 8078 Brass Hose Fitting, 1 In. o/d x 3/4 In. NPT,SB Chrysler

Spectre 8703 T-Bolt Intake Hose Clamp, Stainless Steel, 3 Inch, Each

Earls 981603ERL Blue Straight -3 AN Male to 1/8 Inch NPT Adapter

Earls 981606ERL Blue Straight -6 AN Male to 1/4 Inch NPT Adapter

Earls 981662ERL Blue Straight -6 AN Male to 1/8 Inch NPT Adapter

Stainless T-Bolt Clamp, 2-7/8 Inch Minimum Clamping Diameter

Stainless T-Bolt Clamp, 3-1/8 Inch Minimum Clamping Diameter

Earls 981668ERL Blue Straight -6 AN Male to 1/2 Inch NPT Adapter

Earls 900306ERL Chrome Fuel Line Hose Clamp, Econ-O-Fit Size 6

Earls 922107ERL Blue 90 Degree -8 AN Male to 1/4 Inch NPT Male Swivel

Ideal Heavy Duty T-Bolt Clamp, 1-1/2 Inch Minimum Clamping Diameter

Earls 968704ERL -4AN to 1/8 Inch NPT Fuel Pressure Gauge Fitting

Mr Gasket 9130G Coolant Overflow Tank, Stainless Steel, 2 x 13 Inch

Earls SS981603ERL Straight -3 AN Male to 1/8 Inch NPT

Edelbrock 8159 Pipe to Hose Barb Fitting, Straight, 1/2 in.NPT

Edelbrock 8168 Pipe to Hose Barb Fitting, 90 Deg, 3/8 in. NPT

Earls 750010ERL Vapor Guard 1 Ear Type 3/8 Inch Hose Clamp 5/Pk