International L121 Engine Parts

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International L121

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International L121

Products

Earls |

#425AT982244ERL

Earls AT982244ERL -4 AN Male to 1/4 Inch NPT Aluminum 90 Degree Elbow

Fitting End A:

-4 AN Male

Fitting End B:

1/4" NPT Male

Angle:

90 degree

$9.95

/each

-7%

Earls |

#425AT982268ERL

Earls AT982268ERL -6 AN Male to 1/2 Inch NPT Aluminum 90 Degree Elbow

(1)

Fitting End A:

-6 AN Male

Fitting End B:

1/2" NPT Male

Angle:

90 degree

$34.82

/each

$37.67

-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%

Hooker BHS518 Blackheart LT Swap Exhaust Manifolds, Black Ceramic

Hooker Headers |

#425BHS518

Hooker BHS518 Blackheart LT Swap Exhaust Manifolds, Black Ceramic

Finish:

Ceramic Coated

Collector Diameter:

2-1/2 Inch

$571.95

/set

$618.95

-21%

Powermaster |

#2557468104

Powermaster 7468-104 Race Alternator, 90A, XS Volt 1 Wire Reg

One Wire Alternator:

Yes

Alternator Amperage:

90 amp

Alternator Finish:

Natural

$284.99

/each

$365.00

LT1 Engine Build Combinations | Recipes for 400–700+ HP

Build a high-performance Gen V LT engine with proven power combos and learn about LT upgrades and tuning tips for maximum power

Gen III/IV LS Engine ID Guide

Looking to swap the venerable LS engine into your hot rod, muscle car, or classic truck? Take a look at our detailed identification guide for Gen III/IV LS engines before you hit the salvage yard or swap meet!

Historic Indy Engines

To celebrate the upcoming 106th running of the Indianaplis 500, here's a look back at a few of the engines that have competed at the Brickyard over the years.

Pick a Side: LS Engines

The GM LS engine is the hot powerplant these days. But is there too much of a good thing?

Engine Cylinder Numbers

Chevy L79 327 Engine I History, Specs, & Build Ideas

The 1964 Corvette L79 327 is legendary, learn more about this storied engine and what you need to build a clone.

Corvette L76 327 Engine History, Specs, and Build Ideas

The 1964 Corvette L76 327 is legendary, learn more about this storied engine and what you need to build a clone.

Building up an LT1

In this Tech Tip, John discusses LT1 rotating assembly options for a customer looking to build a solid autoX, drag, and occasional strip powerplant for his Firebird.

Speedway Tech Talk - LS1 Fuel Delivery Kit

Pat talks about one of our LS1 fuel delivery kits.

-21%

Powermaster |

#2557472104

Powermaster 7472-104 Race Alternator, 100A, 12V 1 Wire Regulator

One Wire Alternator:

Yes

Alternator Amperage:

100 amp

Alternator Finish:

Natural

$253.99

/each

$322.50

-21%

Powermaster |

#2557478104

Powermaster 7478-104 Race Alternator, 100A, XS Volt 1 Wire Reg

One Wire Alternator:

Yes

Alternator Amperage:

100 amp

Alternator Finish:

Natural

$284.99

/each

$365.00

-10%

Powermaster |

#255950509

Powermaster 9505-09 Infi-Clock Starter Adapter, For PN[9505]

GTIN Code:

692209011712

$80.99

/each

$90.00

$132 Off

Holley |

#425550930T

Holley 550-930T Terminator X Max Early Truck Engine MPFI Kit

Ignition Type:

Factory GM

Injector Connector:

Multec 2

Tuner Style:

USB/CAN Tuning Cable

$1,949.95

/each

$2,081.95

-6%

Holley Sniper |

#425565310K

Holley Sniper 565-310K Hyperspark Master Kit, 565-310, Oldsmobile

Sold in Quantity:

Kit

Distributor Included:

Yes

$1,049.95

/kit

$1,124.95

-6%

Holley Sniper |

#425565301K

Holley Sniper 565-301K Hyperspark Master Kit, 565-301 Dist., Ford

Sold in Quantity:

Kit

Distributor Included:

Yes

$1,049.95

/kit

$1,124.95

-6%

Holley Sniper |

#425565304K

Holley Sniper 565-304K Hyperspark Master Kit, 565-304, Chrysler

Sold in Quantity:

Kit

Distributor Included:

Yes

$1,049.95

/kit

$1,124.95

-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

$132 Off

Holley |

#425550918T

Holley 550-918T Terminator X Max LS2/LS3 MPFI Kit

Ignition Type:

Factory GM

Injector Connector:

USCAR (EV6)

Tuner Style:

USB/CAN Tuning Cable

$1,949.95

/each

$2,081.95

-7%

Earls |

#425591932ERL

Earls 591932ERL Brake Adapter, 7/16 Inch-24, -3 AN, Zinc Plated Steel

(3)

Fitting End A:

-3 AN Male

Fitting End B:

7/16"-24 I.F. Male

Material Type:

Steel

$22.40

/each

$24.23

-7%

Earls |

#425593204ERL

Earls 593204ERL 3/8 Inch NPT Internal Plug, Blue Anodized, Aluminum

(1)

Fitting Type:

Plug Fitting

Fitting Size 1:

3/8" Male NPT

Fitting Attachment 1:

Male NPT

$14.92

/pair

$16.14

-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 |

#425809106ERL

Earls 809106ERL 90 Degree -6 AN Female to -6 AN Hose Adapter

(1)

Fitting Hose Size:

-6 AN

Fitting End A:

-6 AN Female

Fitting End B:

-6 AN Hose

$40.68

/each

$44.01

-7%

Earls |

#425812006ERL

Earls 812006ERL 120 Degree -6 AN Female to -6 AN Hose Adapter

Fitting Hose Size:

-6 AN

Fitting End A:

-6 AN Female

Fitting End B:

-6 AN Hose

$44.35

/each

$47.97

-7%

Earls |

#425812008ERL

Earls 812008ERL 120 Degree -8 AN Female to -8 AN Hose Adapter

Fitting Hose Size:

-8 AN

Fitting End A:

-8 AN Female

Fitting End B:

-8 AN Hose

$51.95

/each

$56.19

-22%

Powermaster |

#25528472114

Powermaster 28472-114 Race Alternator, 100A, 12V 1 Wire Regulator

One Wire Alternator:

Yes

Alternator Amperage:

100 amp

Alternator Finish:

Polished

$315.99

/each

$407.50

$103 Off

Powermaster |

#25528478114

Powermaster 28478-114 Race Alternator, 100A, XS Volt 1 Wire Reg

One Wire Alternator:

Yes

Alternator Amperage:

100 amp

Alternator Finish:

Polished

$345.99

/each

$448.75

-7%

Earls |

#425982403ERL

Earls 982403ERL Blue Anodized -3 AN Male Tee, Lightweight Aluminum

Fitting End A:

-3 AN Male

Fitting End B:

-3 AN Male

Fitting End C:

-3 AN Male

$16.42

/each

$17.76

-7%

Earls |

#425982406ERL

Earls 982406ERL Blue Anodized -6 AN Male Tee, Lightweight Aluminum

Fitting End A:

-6 AN Male

Fitting End B:

- 6 AN Male

Fitting End C:

-6 AN Male

$19.43

/each

$21.02

-7%

Earls |

#425920508ERL

Earls 920508ERL 90 Degree, -8 AN Male to -8 AN Female Swivel

(1)

Fitting End A:

-8 AN Male

Fitting End B:

-8 AN Female

Angle:

90 degree

$34.82

/each

$37.67

-20%

Powermaster |

#25537297344

Powermaster 37297-344 Smooth Look Alternator, 140A, V-belt, 12V

One Wire Alternator:

Yes

Alternator Amperage:

140 amp

Alternator Finish:

Chrome

$243.99

/each

$308.75

$132 Off

Powermaster |

#255282091

Powermaster 282091 PowerGEN Alternator, 90 Amps, V-belt, 12V

One Wire Alternator:

Yes

Alternator Amperage:

90 amp

Alternator Finish:

Polished

$423.99

/each

$556.25

-7%

Earls |

#425984004ERL

Earls 984004ERL Blue Straight 1/4 Inch Hose Barb to 1/8 Inch NPT Male

(1)

Fitting End A:

1/4" Hose barb

Fitting End B:

1/8" NPT Male

Angle:

Straight

$10.40

/each

$11.25

-7%

Earls |

#425985006ERL

Earls 985006ERL Blue -6 AN Male to 9/16-18 Inch O-Ring Port Adapter

Fitting End A:

-6 AN Male

Fitting End B:

9/16" - 18 Male O-ring (-6 AN)

Angle:

Straight

$16.42

/each

$17.76

-7%

Earls |

#425985008ERL

Earls 985008ERL Blue -8 AN Male to3/4-16 Inch O-Ring Port Adapter

Fitting End A:

-8 AN Male

Fitting End B:

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

Angle:

Straight

$20.89

/each

$22.60

-7%

Earls |

#4259892108ERL

Earls 9892108ERL Blue -10 AN Female to -8 AN Male Flare Reducer

Angle:

Straight

Fitting End A:

-10 AN Female

Fitting End B:

-8 AN Male

$25.36

/each

$27.43

Earls |

#425989532ERL

Earls 989532ERL -4 AN to 3/8-24 Tubing Adapter, Zinc Plated

Fitting End A:

-4 AN Male

Fitting End B:

3/8"-24 I.F. Female

Material Type:

Steel

$5.95

/each

-7%

Earls |

#425989538ERL

Earls 989538ERL -3 AN to 10mm x 1.0 IFF Tubing Adapter for Toyota

Fitting End A:

-3 AN Male

Fitting End B:

10mm x 1.0 I.F. Female / Toyota

Material Type:

Steel

$11.93

/each

$12.90

-7%

Earls |

#425989543ERL

Earls 989543ERL -3 AN to 3/8-24 IFF Tubing Adapter, Zinc Plated

(3)

Fitting End A:

-3 AN Male

Fitting End B:

3/8"-24 I.F. Female

Material Type:

Steel

$10.80

/each

$11.68

-7%

Earls |

#425915103ERL

Earls 915103ERL Blue Anodized Straight -3AN Female Swivel Coupling

(1)

Fitting End A:

-3 AN Female

Fitting End B:

-3 AN Female

Angle:

Straight

$16.42

/each

$17.76

-7%

Earls |

#425915106ERL

Earls 915106ERL Blue Anodized Straight -6 AN Female Swivel Coupling

(4)

Fitting End A:

-6 AN Female

Fitting End B:

-6 AN Female

Angle:

Straight

$14.85

/each

$16.07

Showing 1 - 792 of 5,556 results

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International L121 Engine Parts

Year

Subcategory

Part

Brand

Transmission Family

Availability

Engine Family

Discounts

Price

Customer Rating

Products

Earls AT982244ERL -4 AN Male to 1/4 Inch NPT Aluminum 90 Degree Elbow

Earls AT982268ERL -6 AN Male to 1/2 Inch NPT Aluminum 90 Degree Elbow

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

Hooker BHS518 Blackheart LT Swap Exhaust Manifolds, Black Ceramic

Powermaster 7468-104 Race Alternator, 90A, XS Volt 1 Wire Reg

Related Articles

Powermaster 7472-104 Race Alternator, 100A, 12V 1 Wire Regulator

Powermaster 7478-104 Race Alternator, 100A, XS Volt 1 Wire Reg

Powermaster 9505-09 Infi-Clock Starter Adapter, For PN[9505]

Holley 550-930T Terminator X Max Early Truck Engine MPFI Kit

Holley Sniper 565-310K Hyperspark Master Kit, 565-310, Oldsmobile

Holley Sniper 565-301K Hyperspark Master Kit, 565-301 Dist., Ford

Holley Sniper 565-304K Hyperspark Master Kit, 565-304, Chrysler

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

Holley 550-918T Terminator X Max LS2/LS3 MPFI Kit

Earls 591932ERL Brake Adapter, 7/16 Inch-24, -3 AN, Zinc Plated Steel

Earls 593204ERL 3/8 Inch NPT Internal Plug, Blue Anodized, Aluminum

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

Earls 809106ERL 90 Degree -6 AN Female to -6 AN Hose Adapter

Earls 812006ERL 120 Degree -6 AN Female to -6 AN Hose Adapter

Earls 812008ERL 120 Degree -8 AN Female to -8 AN Hose Adapter

Powermaster 28472-114 Race Alternator, 100A, 12V 1 Wire Regulator

Powermaster 28478-114 Race Alternator, 100A, XS Volt 1 Wire Reg

Earls 982403ERL Blue Anodized -3 AN Male Tee, Lightweight Aluminum

Earls 982406ERL Blue Anodized -6 AN Male Tee, Lightweight Aluminum

Earls 920508ERL 90 Degree, -8 AN Male to -8 AN Female Swivel

Powermaster 37297-344 Smooth Look Alternator, 140A, V-belt, 12V

Powermaster 282091 PowerGEN Alternator, 90 Amps, V-belt, 12V

Earls 984004ERL Blue Straight 1/4 Inch Hose Barb to 1/8 Inch NPT Male

Earls 985006ERL Blue -6 AN Male to 9/16-18 Inch O-Ring Port Adapter

Earls 985008ERL Blue -8 AN Male to3/4-16 Inch O-Ring Port Adapter

Earls 9892108ERL Blue -10 AN Female to -8 AN Male Flare Reducer

Earls 989532ERL -4 AN to 3/8-24 Tubing Adapter, Zinc Plated

Earls 989538ERL -3 AN to 10mm x 1.0 IFF Tubing Adapter for Toyota

Earls 989543ERL -3 AN to 3/8-24 IFF Tubing Adapter, Zinc Plated

Earls 915103ERL Blue Anodized Straight -3AN Female Swivel Coupling

Earls 915106ERL Blue Anodized Straight -6 AN Female Swivel Coupling