GMC K25 Engine Parts

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All American Billet |

#38810270

All American Billet FDS-440-351, Machined, Serp Kit w/ AC & PS

Water Pump Style:

Short

Pulley Style:

Serpentine, original pulleys with triangular cutouts

Crankshaft Pulley Included:

Yes

$2,695.00

/set

-7%

Earls |

#425997120ERL

Earls 997120ERL -20 AN Male Weld Fitting, Lightweight Aluminum

AN Size:

-20 AN

Thread Type:

RH Male

Fitting Attachment 1:

Male Threads

$41.81

/each

$45.23

-7%

Earls |

#425924103ERL

Earls 924103ERL 45 Degree -3AN Male to -3 AN Female Swivel

Fitting End A:

-3 AN Male

Fitting End B:

-3 AN Female

Angle:

45 degree

$37.66

/each

$40.74

-7%

Earls |

#425925103ERL

Earls 925103ERL Blue Anodized -3 AN Tee, Female Swivel on Branch

Fitting End A:

-3 AN Female

Fitting End B:

-3 AN Male

Fitting End C:

-3 AN Male

$70.99

/each

$76.95

-7%

Earls |

#425925106ERL

Earls 925106ERL Blue Anodized -6 AN Tee, Female Swivel on Branch

Fitting End A:

-6 AN Female

Fitting End B:

-6 AN Male

Fitting End C:

-6 AN Male

$41.81

/each

$45.23

Speedway Motors Introduces New IMCA Modified Spec Racing Engine as they Kick Off 2025 Race Season

Speedway Motors announced today the introduction of a new IMCA Modified Spec Racing Engine as they kick off the 2025 race season along with discounts Jan. 27-Feb. 2 to help their customers get ready for race season.

55 Chevy Engine Build

Derek kicks off his 55 Chevy rebuild with a fresh small block.

Seven Decades of Speedway Motors: Carson, Craig & Clay Smith | Episode 25

For this special anniversary episode we celebrate 70 years of Speedway Motors with Carson, Craig, and Clay Smith. As the sons of "Speedy" Bill and Joyce Smith, they were there for it all as the business and the family grew up together.

-7%

Earls |

#425AT985068ERL

Earls AT985068ERL -6 AN Male to 3/4-16 Inch O-Ring Port Adapter

(1)

Fitting End A:

-6 AN Male

Fitting End B:

3/4" - 16 Male O-ring (-8 AN)

Angle:

Straight

$22.99

/each

$24.87

-7%

Earls |

#425AT985081ERL

Earls AT985081ERL -8 AN Male to 7/8-14 Inch O-Ring Port Adapter

Fitting End A:

-8 AN Male

Fitting End B:

7/8" - 14 Male O-ring (-10 AN)

Angle:

Straight

$24.36

/each

$26.35

-7%

Earls |

#425AT985086ERL

Earls AT985086ERL -8 AN Male to -6AN O-Ring Port Adapter

Fitting End A:

-8 AN Male

Fitting End B:

-6 AN Male o-ring

Angle:

Straight

$25.36

/each

$27.43

-5%

Earls |

#425960403ERL

Earls 960403ERL -3 AN Bulkhead Tee on Run, Zinc Plated Steel

(1)

AN Size:

-3 AN

Angle:

Tee

Fitting End A:

-3 AN Male

$49.95

/each

$52.76

-5%

Hooker Headers |

#42518510

Hooker Headers Blackheart LS Turbo Manifold Kits

Header Tube Type:

Turbo

Material Type:

Stainless Steel

Hardware Included:

Yes

$849.95

/pair

$899.95

-7%

Earls |

#425580603ERL

Earls 580603ERL -3 AN Flare Plug Fitting, Blue Anodized, Pair

Fitting End A:

-3 AN

Fitting Attachment 1:

Male AN

Material Type:

Aluminum

$7.40

/pair

$8.01

-7%

Earls |

#425581533ERL

Earls 581533ERL Brake Adapter, 3/8 Inch-24, -3 AN

(4)

Fitting End A:

-3 AN Male

Fitting End B:

3/8"-24 I.F. Male (long)

Material Type:

Steel

$16.43

/each

$17.78

-8%

Holley |

#42597179

Holley 97-179 Tensioner Assembly with Smooth Pulley

GTIN Code:

090127018576

$181.95

/each

$197.95

Colored Billet Aluminum Custom Hose Clamps, 1.5 - 4 Inch Sizes

Speedway Motors |

#91001356

Colored Billet Aluminum Custom Hose Clamps, 1.5 - 4 Inch Sizes

(21)

Style:

Worm Gear

Material Type:

Aluminum

Reusable:

Yes

$11.49

/each

Titan Tools |

#72845207

Titan Tools 45207 Hose Clamp Assortment, 20 Piece

(3)

Style:

Worm Gear

Material Type:

Steel

Color:

Natural

$15.99

/box

-9%

New Vintage USA |

#2760112691

New Vintage USA 01126-91 Performance Oil Pressure Black

$169.99

/each

$186.99

-9%

New Vintage USA |

#2760112693

New Vintage USA 01126-93 Performance Oil Pressure White

$169.99

/each

$186.99

Holley |

#4254674

Holley 46-74 Universal Throttle Fast Idle Solenoid

(2)

GTIN Code:

090127068885

$155.95

/each

$229 Off

Holley |

#425550601N

Holley EFI 550-601N HP EFI ECU And Harness Kits

Ignition Type:

Universal

Injector Connector:

GM TPI

Sold in Quantity:

Kit

$2,999.95

/each

$3,228.95

$210 Off

Holley |

#425550602

Holley 550-602 HP EFI ECU & Harness Kit, LS1/LS6, Bosch O2

Ignition Type:

Factory GM

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

USB/CAN Tuning Cable

$2,849.95

/each

$3,059.95

$242 Off

Holley |

#425550602N

Holley 550-602N HP EFI ECU & Harness Kit, LS1/LS6, NTK O2

Ignition Type:

Factory GM

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

USB/CAN Tuning Cable

$3,099.95

/each

$3,341.95

$210 Off

Holley |

#425550603

Holley 550-603 HP EFI ECU & Harness Kit, LS2/LS3/LS7, Bosch O2

Ignition Type:

Factory GM

Injector Connector:

USCAR (EV6)

Tuner Style:

USB/CAN Tuning Cable

$2,849.95

/each

$3,059.95

$187 Off

Holley |

#425550604

Holley 550-604 HP EFI ECU & Harness Kit, Universal, Bosch O2

Ignition Type:

Universal

Injector Connector:

Jetronic / Minitimer (EV1)

Sold in Quantity:

Kit

$2,749.95

/each

$2,936.95

-6%

Holley Sniper |

#425550849

Holley Sniper 550-849 EFI 2300 2-Barrel Self-Tuning Base Kit

Injection Style:

Throttle Body

Injector Size:

100 lb/hr @ 58.5 PSI

ECM Included:

Yes

$1,299.95

/each

$1,383.95

$200 Off

Holley |

#4255501011

Holley 550-1011 Terminator X Max Stealth 4150 EFI wTrans Control

Injection Style:

Throttle Body

Injector Size:

100 lb/hr @ 58.5 PSI

Max Horsepower Rating:

650

$2,499.95

/each

$2,699.95

$200 Off

Holley |

#4255501012

Holley 550-1012 Terminator X Max Stealth 4150 EFI wTrans Control

Injection Style:

Throttle Body

Injector Size:

100 lb/hr @ 58.5 PSI

Max Horsepower Rating:

650

$2,499.95

/each

$2,699.95

-7%

Holley |

#425554203

Holley EFI 554-203 Boosted Sensor Kit - MAP, IAT, Temp, Pressure

MAP Sensor Included:

Yes

Sold in Quantity:

Kit

$531.95

/kit

$575.95

$150 Off

Holley |

#4255501001

Holley 550-1001 Terminator X Stealth 4150 EFI System 650 HP Shiny

Injection Style:

Throttle Body

Injector Size:

100 lb/hr @ 58.5 PSI

Max Horsepower Rating:

650

$2,099.95

/each

$2,249.95

$150 Off

Holley |

#4255501002

Holley 550-1002 Terminator X Stealth 4150 EFI System 650 HP Black

Injection Style:

Throttle Body

Injector Size:

100 lb/hr @ 58.5 PSI

Max Horsepower Rating:

650

$2,099.95

/each

$2,249.95

$187 Off

Holley |

#425554119

Holley 554-119 Terminator EFI ECU

Transmission Control:

GTIN Code:

090127685556

Sold in Quantity:

Each

$2,349.95

/each

$2,536.95

$119 Off

Holley Sniper |

#425550857

Holley Sniper 550-857 Rochester 2GC EFI Conversion, Classic Gold

Injector Size:

100 lb/hr @ 58.5 PSI

Sold in Quantity:

Kit

$1,399.95

/kit

$1,518.95

Granatelli Motor Sports |

#36211629

Granatelli Motor Sports 28-1629HTBB Coil-Near-Plug Connector Kit

Conductor Style:

Solid Core

Diameter:

$298.50

/each

-15%

Moroso |

#54523907

Moroso 23907 Electronic Accumulator Valve, 20-25 PSI

GTIN Code:

084663239076

Finish:

Natural

$356.99

/each

$423.91

-15%

Moroso |

#54523908

Moroso 23908 Electronic Accumulator Valve, 35-40 PSI

GTIN Code:

084663239083

$356.99

/each

$423.91

Proform |

#586141152

Proform 141-152 Slant-Edge Alternator, GM 10SI, 100 Amp, Black

One Wire Alternator:

Yes

Alternator Amperage:

100 amp

Alternator Finish:

Matte

$269.95

/each

Speedway Motors |

#91001349

Speedway Motors Blow-Off Valve, 50mm

Blow-Off Valve Size:

50mm

Color:

Polished

Sold in Quantity:

Each

$65.99

/each

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GMC K25 Engine Parts

Year

Subcategory

Part

Brand

Transmission Family

Availability

Engine Family

Discounts

Price

Customer Rating

Products

All American Billet FDS-440-351, Machined, Serp Kit w/ AC & PS

Earls 997120ERL -20 AN Male Weld Fitting, Lightweight Aluminum

Earls 924103ERL 45 Degree -3AN Male to -3 AN Female Swivel

Earls 925103ERL Blue Anodized -3 AN Tee, Female Swivel on Branch

Earls 925106ERL Blue Anodized -6 AN Tee, Female Swivel on Branch

Related Articles

Earls AT985068ERL -6 AN Male to 3/4-16 Inch O-Ring Port Adapter

Earls AT985081ERL -8 AN Male to 7/8-14 Inch O-Ring Port Adapter

Earls AT985086ERL -8 AN Male to -6AN O-Ring Port Adapter

Earls 960403ERL -3 AN Bulkhead Tee on Run, Zinc Plated Steel

Hooker Headers Blackheart LS Turbo Manifold Kits

Earls 580603ERL -3 AN Flare Plug Fitting, Blue Anodized, Pair

Earls 581533ERL Brake Adapter, 3/8 Inch-24, -3 AN

Holley 97-179 Tensioner Assembly with Smooth Pulley

Colored Billet Aluminum Custom Hose Clamps, 1.5 - 4 Inch Sizes

Titan Tools 45207 Hose Clamp Assortment, 20 Piece

New Vintage USA 01126-91 Performance Oil Pressure Black

New Vintage USA 01126-93 Performance Oil Pressure White

Holley 46-74 Universal Throttle Fast Idle Solenoid

Holley EFI 550-601N HP EFI ECU And Harness Kits

Holley 550-602 HP EFI ECU & Harness Kit, LS1/LS6, Bosch O2

Holley 550-602N HP EFI ECU & Harness Kit, LS1/LS6, NTK O2

Holley 550-603 HP EFI ECU & Harness Kit, LS2/LS3/LS7, Bosch O2

Holley 550-604 HP EFI ECU & Harness Kit, Universal, Bosch O2

Holley Sniper 550-849 EFI 2300 2-Barrel Self-Tuning Base Kit

Holley 550-1011 Terminator X Max Stealth 4150 EFI wTrans Control

Holley 550-1012 Terminator X Max Stealth 4150 EFI wTrans Control

Holley EFI 554-203 Boosted Sensor Kit - MAP, IAT, Temp, Pressure

Holley 550-1001 Terminator X Stealth 4150 EFI System 650 HP Shiny

Holley 550-1002 Terminator X Stealth 4150 EFI System 650 HP Black

Holley 554-119 Terminator EFI ECU

Holley Sniper 550-857 Rochester 2GC EFI Conversion, Classic Gold

Granatelli Motor Sports 28-1629HTBB Coil-Near-Plug Connector Kit

Moroso 23907 Electronic Accumulator Valve, 20-25 PSI

Moroso 23908 Electronic Accumulator Valve, 35-40 PSI

Proform 141-152 Slant-Edge Alternator, GM 10SI, 100 Amp, Black

Speedway Motors Blow-Off Valve, 50mm