1978 Dodge D300 Engine Parts

5,798 products fit your

1978 Dodge D300

Add Engine

Show Direct Fit Parts

5,798 products

Sort By:

Clear All

Fitment

1978 Dodge D300

Products

-7%

Earls |

#425961603ERL

Earls 961603ERL Straight -3 AN Male to 1/8 Inch NPT, Zinc Plated Steel

(1)

Fitting End A:

-3 AN Male

Fitting End B:

1/8" NPT Male

Angle:

Straight

$9.44

/each

$10.22

-7%

Earls |

#425178008ERL

Earls 178008ERL Stat-O-Seal, 1/2 Inch Diameter, Fits -5 AN Fitting

(1)

Fitting Size 1:

-5 AN

AN Size:

-5 AN

Inside Diameter:

0.5"

$11.91

/pair

$12.88

-7%

NOS 17835NOS Specialty Y Fitting, -6 AN x -6 AN x -6 AN, Blue

NOS |

#42517835NOS

NOS 17835NOS Specialty Y Fitting, -6 AN x -6 AN x -6 AN, Blue

Fitting End A:

-6 AN Male

Fitting End B:

-6 AN Male

Material Type:

Aluminum

$83.15

/each

$89.95

-7%

Holley |

#425112114

Holley 112-114 Throttle Body Kit, 0-80670

GTIN Code:

090127662670

$233.95

/each

$253.95

-7%

Holley |

#425112120

Holley 112-120 Throttle Body Kit, 0-80528-1

GTIN Code:

090127662731

$281.95

/each

$305.95

1946 Ford Sedan Delivery Engine Detail

Speedway Motors Product Manager Jeff K. talks about how to really make your engine bay stand out from the crowd with just a little patience, and some Speedway products.

Chris Ryan's 1978 Pontiac Trans Am

Chris Ryan's '78 Firebird is a loving tribute to that famous Trans Am from _Smokey & the Bandit_, but with style and performance that would have been nearly impossible when the Bandit was busy with Sheriff Justice.

Engine Cylinder Numbers

-7%

Holley |

#425112122

Holley 112-122 Throttle Body Kit, 0-80496-1

GTIN Code:

090127662755

$304.95

/each

$330.95

-7%

Earls |

#425AT981666ERL

Earls AT981666ERL -6 AN Male to 3/8 Inch NPT Straight Adapter

(2)

Fitting End A:

-6 AN Male

Fitting End B:

3/8" NPT Male

Angle:

Straight

$10.09

/each

$10.91

-7%

Earls |

#425AT981668ERL

Earls AT981668ERL -6 AN Male to 1/2 Inch NPT Straight Adapter

(1)

Fitting End A:

-6 AN Male

Fitting End B:

1/2" NPT Male

Angle:

Straight

$19.43

/each

$21.02

-7%

Earls |

#425AT981688ERL

Earls AT981688ERL -8 AN Male to 1/2 Inch NPT Straight Adapter

(1)

Fitting End A:

-8 AN Male

Fitting End B:

1/2" NPT Male

Angle:

Straight

$13.41

/each

$14.50

-7%

Holley |

#4252037

Holley 20-37 Throttle Stud 7/32 Inch Diameter

Material Type:

Steel

Finish:

Natural

Mounting Hardware Included:

Yes

$14.89

/each

$16.11

-7%

Holley |

#4252054

Holley 20-54 Mechanical Secondary Throttle Connecting Rod

(3)

Material Type:

Steel

Finish:

Natural

GTIN Code:

090127036204

$16.39

/each

$17.73

-7%

Holley |

#4252072

Holley 20-72 Universal Solenoid/Dashpot Bracket

GTIN Code:

090127036372

$41.81

/each

$45.23

-7%

Earls |

#425981604ERL

Earls 981604ERL Blue Straight -4 AN Male to 1/8 Inch NPT Adapter

Fitting End A:

-4 AN Male

Fitting End B:

1/8" NPT Male

Angle:

Straight

$7.43

/each

$8.03

Speedway Motors |

#9101747

LS Engine Swap Conversion Low Profile Oil Pan, Chrome, 10 AN

(2)

Sump Style:

Wet Sump

Sump Location:

Rear

$212.99

/each

-7%

Earls |

#425AT840106ERL

Earls AT840106ERL Straight -6 AN Male to -6 AN Swivel Seal Hose

Fitting Hose Size:

-6 AN

Fitting End A:

-6 AN Male

Fitting End B:

-6 AN Hose

$26.86

/each

$29.06

-7%

Earls |

#425900506ERL

Earls 900506ERL Black Hose Clamp Fits Perform-O-Flex Hose Size 6

Style:

Worm Gear | Housing

Material Type:

Aluminum

Color:

Black

$8.93

/each

$9.66

-7%

Earls |

#425900508ERL

Earls 900508ERL Black Hose Clamp Fits Perform-O-Flex Hose Size 7 or 8

Style:

Worm Gear | Housing

Material Type:

Aluminum

Color:

Black

$11.94

/each

$12.92

-7%

Holley |

#425112587

Holley 112-587 Universal 4BBL 1000CFM 4150 Flange Throttle Body

Throttle Body Style:

Multi-Port Injection (MPI)

Sold in Quantity:

Each

$779.95

/each

$843.95

-7%

Holley |

#425112588

Holley 112-588 Universal 4BBL 1000CFM 4150 Flange Throttle Body

Throttle Body Style:

Multi-Port Injection (MPI)

Sold in Quantity:

Each

$623.95

/each

$674.95

-7%

Earls |

#425169212ERL

Earls 169212ERL Conical Seal Package Of 2, Size -12

AN Size:

-12 AN

Material Type:

Aluminum

$28.36

/pair

$30.68

-7%

Earls |

#425AT100194ERL

Earls AT100194ERL Fuel Pressure Gauge Adapter -6 Male to 3/8 Inch NPT

(1)

Fitting End A:

-6 AN Male

Fitting End B:

3/8" NPT Male

Fitting End C:

1/8" NPT Female

$26.87

/each

$29.07

$100 Off

Holley |

#425082751

Holley 0-82751 750 CFM Street HP Carburetor

Carburetor Barrels:

4-Barrel

Fuel Type:

Gasoline

Choke Type:

No Choke

$799.95

/each

$899.95

-8%

Weiand |

#4257221

Weiand 7221 Hilborn Style 2x4 Air Scoop, Polished Cast Aluminum

GTIN Code:

032474722102

$449.95

/each

$489.95

-7%

Earls |

#425178006ERL

Earls 178006ERL Stat-O-Seal, 3/8 Inch Diameter, Fits -3 AN Fitting

(3)

Fitting Size 1:

3/8"

AN Size:

-3 AN

Inside Diameter:

0.375"

$8.91

/pair

$9.64

-7%

Holley |

#42526139

Holley 26-139 Accelerator Pump Cover, 30cc w/ Lever and Screws

GTIN Code:

090127619759

$28.39

/each

$30.71

Holley |

#4252641

Holley 26-41 Umbrella Check Valve

GTIN Code:

090127044186

$20.24

/each

-7%

Earls |

#425AT981503ERL

Earls AT981503ERL -3 AN Male Straight Union, Anodized Aluminum

Fitting End A:

-3 AN Male

Fitting End B:

-3 AN Male

Angle:

Straight

$11.93

/each

$12.90

-7%

Earls |

#425AT981506ERL

Earls AT981506ERL -6 AN Male Straight Union, Anodized Aluminum

(2)

Fitting End A:

-6 AN Male

Fitting End B:

-6 AN Male

Angle:

Straight

$9.42

/each

$10.19

-8%

Earls |

#425609236ERL

Earls 609236ERL 90 Deg -6 AN Aluminum Adjustable Speed-Seal Hose End

Fitting Hose Size:

-6 AN

Fitting End A:

-6 AN Female

Fitting End B:

-6 AN Hose

$73.25

/each

$79.95

-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

-7%

Earls |

#425100187ERL

Earls 100187ERL Oil Filled 100 PSI Pressure Gauge

(3)

Gauge Diameter:

1-7/8"

Gauge Series:

Analog

Gauge Range:

0-100 psi

$51.95

/each

$56.19

$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

-7%

Earls |

#425AT592903ERL

Earls AT592903ERL Aluminum -3 AN Flare Fitting Cap, Black, Pair

Material Type:

Aluminum

Sold in Quantity:

Pair

$11.90

/pair

$12.87

-7%

Earls |

#425AT592906ERL

Earls AT592906ERL Aluminum -6 AN Flare Fitting Cap, Black, Pair

(6)

Material Type:

Aluminum

Sold in Quantity:

Pair

$10.80

/pair

$11.68

Showing 1 - 576 of 5,798 results

Shop Feedback:

Did you find what you are looking for?

1978 Dodge D300 Engine Parts

Subcategory

Part

Brand

Transmission Family

Availability

Engine Family

Discounts

Price

Customer Rating

Products

Earls 961603ERL Straight -3 AN Male to 1/8 Inch NPT, Zinc Plated Steel

Earls 178008ERL Stat-O-Seal, 1/2 Inch Diameter, Fits -5 AN Fitting

NOS 17835NOS Specialty Y Fitting, -6 AN x -6 AN x -6 AN, Blue

Holley 112-114 Throttle Body Kit, 0-80670

Holley 112-120 Throttle Body Kit, 0-80528-1

Related Articles

Holley 112-122 Throttle Body Kit, 0-80496-1

Earls AT981666ERL -6 AN Male to 3/8 Inch NPT Straight Adapter

Earls AT981668ERL -6 AN Male to 1/2 Inch NPT Straight Adapter

Earls AT981688ERL -8 AN Male to 1/2 Inch NPT Straight Adapter

Holley 20-37 Throttle Stud 7/32 Inch Diameter

Holley 20-54 Mechanical Secondary Throttle Connecting Rod

Holley 20-72 Universal Solenoid/Dashpot Bracket

Earls 981604ERL Blue Straight -4 AN Male to 1/8 Inch NPT Adapter

LS Engine Swap Conversion Low Profile Oil Pan, Chrome, 10 AN

Earls AT840106ERL Straight -6 AN Male to -6 AN Swivel Seal Hose

Earls 900506ERL Black Hose Clamp Fits Perform-O-Flex Hose Size 6

Earls 900508ERL Black Hose Clamp Fits Perform-O-Flex Hose Size 7 or 8

Holley 112-587 Universal 4BBL 1000CFM 4150 Flange Throttle Body

Holley 112-588 Universal 4BBL 1000CFM 4150 Flange Throttle Body

Earls 169212ERL Conical Seal Package Of 2, Size -12

Earls AT100194ERL Fuel Pressure Gauge Adapter -6 Male to 3/8 Inch NPT

Holley 0-82751 750 CFM Street HP Carburetor

Weiand 7221 Hilborn Style 2x4 Air Scoop, Polished Cast Aluminum

Earls 178006ERL Stat-O-Seal, 3/8 Inch Diameter, Fits -3 AN Fitting

Holley 26-139 Accelerator Pump Cover, 30cc w/ Lever and Screws

Holley 26-41 Umbrella Check Valve

Earls AT981503ERL -3 AN Male Straight Union, Anodized Aluminum

Earls AT981506ERL -6 AN Male Straight Union, Anodized Aluminum

Earls 609236ERL 90 Deg -6 AN Aluminum Adjustable Speed-Seal Hose End

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

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

Earls 100187ERL Oil Filled 100 PSI Pressure Gauge

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

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

Earls AT592903ERL Aluminum -3 AN Flare Fitting Cap, Black, Pair

Earls AT592906ERL Aluminum -6 AN Flare Fitting Cap, Black, Pair