International L121 Engine Parts

Get an exact fit for your

International L121

Year

Choose Year

Year

Make

International

Make

Model

L121

Model

5,570 products

Sort By:

Clear All

Fitment

International L121

Products

-7%

Earls |

#425AT700145ERL

Earls AT700145ERL Super Stock Straight -4 AN Female to 1/4 Inch Barb

Fitting Hose Size:

-4 AN

Fitting End A:

-4 AN Female

Fitting End B:

-4 AN Hose

$10.60

/each

$11.46

-7%

Earls |

#425AT915186ERL

Earls AT915186ERL Straight -8 AN to -6 AN Female Swivel Coupling

(1)

Angle:

Straight

Fitting End A:

-8 AN Female

Fitting End B:

-6 AN Female

$19.41

/each

$20.99

-7%

Earls |

#425AT992908ERL

Earls AT992908ERL Aluminum -8 AN Flare Fitting Cap, Black

Material Type:

Aluminum

Sold in Quantity:

Each

$11.93

/each

$12.90

Earls |

#425754156ERL

Earls 754156ERL Vapor Guard 45 Deg Hose End -6 to 5/16 Inch

Fitting Hose Size:

-6 AN

Fitting End A:

-6 AN Female

Fitting End B:

5/16" Hose barb

$11.95

/each

Driven Racing Oil |

#91026156

Driven Racing Oil 26156 Circle Track Synthetic Oil 10W50, 12 Qts

Oil Weight:

10W50

Oil Type:

Synthetic

Liquid Measurement:

12 quarts

$215.88

/box

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.

-7%

Mr Gasket |

#5501485

Mr Gasket 1485 Flat Top Dual Quad Air Cleaner

(6)

Shape:

Round

Overall Diameter:

6.5"

Filter Material:

White paper

$45.29

/each

$48.99

Russell |

#61766203

Russell 662031 Endura Finish Aluminum Pipe Plug-1/8 In NPT

(2)

Fitting Type:

Plug Fitting

Fitting Size 1:

1/8" Male NPT

Fitting Attachment 1:

Male NPT

$6.95

/pair

-24%

Vibrant |

#32100006

Vibrant Bellmouth Velocity Stack, Aluminum, 3-5 Inch Inlet

as low as

$49.99

/each

$65.99

-20%

Vibrant |

#32100018

Vibrant HD Pinless Charge Tube Clamp Assembly, Black

Overall Length:

Color:

Black

Material Type:

6061 Aluminum

as low as

$189.99

/each

$237.99

-7%

Earls |

#425SS982203ERL

Earls SS982203ERL 90 Degree Elbow, -3 AN Male to 1/8 Inch NPT

Fitting End A:

-3 AN Male

Fitting End B:

1/8" NPT Male

Angle:

90 degree

$33.24

/each

$35.96

ICT BILLET |

#82651474

ICT BILLET 551474-1 A/C Compressor Bracket Kit, Sanden 508, LS

Material Type:

Billet Aluminum

Hardware Included:

Yes

Finish:

Natural

$400.00

/kit

-69%

Speedway Replacement EPR2 O-Rings for -16 AN Fittings, Pack/5

Speedway Motors |

#6173468

Speedway Replacement EPR2 O-Rings for -16 AN Fittings, Pack/5

AN Size:

-16 AN

Material Type:

Rubber

Fitting Size 1:

-16 AN 1.171

$6.49

/bag

$21.63

-10%

Turbosmart |

#37502041132

Turbosmart TS-0204-1132 RacePort GenV Blow Off Valve, Black

Adjustable:

Yes

Aluminum Flange Included:

Yes

Steel Flange Included:

$320.39

/each

$355.99

Driven Racing Oil |

#91022408

Driven Racing Oil 22408-4 10W40 Crate Engine Oil 4X1 Gallon

Oil Weight:

10W40

Oil Type:

Synthetic

ZDDP Enhanced:

Yes

$292.84

/each

Maxima |

#22983964

Maxima 89-83964 Off Road Coolant, 64 OZ Bottles, Qty 6

Sold in Quantity:

Box

Reserve Alkalinity (5g of product):

12.5 ml

$101.99

/box

Magnuson Superchargers |

#79859003

Magnuson Superchargers 31-26-59-003 Belt Tensioner And Hardware

Sold in Quantity:

Each

$1,267.00

/each

-20%

Vibrant |

#32112780

Vibrant 12780 Gen3 Catch Can Reservoir, Small

Diameter:

2.5 in

Height:

5 in

Fitting Size 1:

-8 ORB drain port

$77.99

/each

$97.99

-21%

Vibrant |

#32112781

Vibrant 12781 Gen3 Catch Can Reservoir, Medium

Diameter:

3.0 in

Height:

6.0 in

$89.99

/each

$113.99

-20%

Vibrant |

#32112760

Vibrant 12760 Gen3 Catch Can Assemblies, Small, 2 Port

Diameter:

3.00 in

Height:

9.00 in

Fitting Size 1:

-12 AN

$247.99

/kit

$309.99

Speedway Motors |

#28981053

LS Crossover Delete Kit

Sold in Quantity:

Set

$9.99

/set

PSI Conversion |

#25800006

PSI Conversion Multec LS Truck Injector Adaptor

Sold in Quantity:

Each

as low as

$80.00

/each

$548 Off

Aeroquip |

#6173414

Aeroquip FBM3414 Stainless Steel Hose Support Coil, -16 AN

Hose Length:

20 ft.

Sold in Quantity:

Box

$204.99

/box

$753.16

VS Racing |

#60300763

VS Racing T763VCL Turbocharger Discharge Flange/Clamp

Material Type:

Stainless Steel

Finish:

Natural

$37.99

/each

Goodridge |

#6177026

Goodridge AN921-10D 90 High-Flow O-Ring -10 AN Hose to Port Fitting

(1)

Fitting End A:

-10 AN Male

Fitting End B:

-10 AN Male O-ring

Angle:

90 degree

$35.99

/each

Kevko |

#917128

Kevko K-128NPT K128 17 Inch Universal Dipstick, 1/4 Inch NPT

Overall Length:

17.00"

Sold in Quantity:

Each

$21.99

/each

Ideal Heavy Duty T-Bolt Clamp, 1-7/8 Inch Minimum Clamping Diameter

Ideal Clamps |

#917188

Ideal Heavy Duty T-Bolt Clamp, 1-7/8 Inch Minimum Clamping Diameter

(1)

Style:

T-Bolt

Material Type:

Steel

Color:

Natural

$7.69

/each

Lucas Oil |

#48410847

Lucas Oil 10847 Synthetic 2-Cycle Snowmobile Oil, Gallon, Case/4

Oil Type:

Synthetic

ZDDP Enhanced:

Liquid Measurement:

4 gallons

$153.99

/box

-20%

Steel -10 AN Fitting for Aeroquip FC300 High Pressure Hose, Straight

Speedway Motors |

#1061306

Steel -10 AN Fitting for Aeroquip FC300 High Pressure Hose, Straight

(2)

Fitting Hose Size:

-10 AN

Fitting End A:

-10 AN Female

Fitting End B:

-10 AN Hose

$17.99

/each

$22.76

Magnuson Superchargers |

#79800680

Magnuson Superchargers 79-83-00-680 680m Rear Cog Belt TVS2650

$113.00

/each

-6%

Earls |

#425679110ERL

Earls 679110ERL 90 Degree -10 AN Tube Hose End

Fitting Hose Size:

-10 AN

Fitting End A:

-10 AN Female

Fitting End B:

-10 AN Hose

$49.95

/each

$53.67

-23%

Aluminum Flare to Pipe Tee on Run Fitting, AN4 to 1/8 Inch NPT

Speedway Motors |

#6176111

Aluminum Flare to Pipe Tee on Run Fitting, AN4 to 1/8 Inch NPT

Fitting End A:

-4 AN Male

Fitting End B:

1/8" NPT Male

Fitting End C:

-4 AN Male

$10.49

/each

$13.74

Edelbrock |

#3258080

Edelbrock 8080 Pipe to Hose Barb Fitting, 1/4-18 NPT X 3/8

(4)

Fitting End A:

3/8" Hose barb

Fitting End B:

1/4" NPT Male

Angle:

Straight

$12.95

/each

Edelbrock |

#3251409

Edelbrock 1409 Marine Series 4BBL 600 CFM Carburetor

(1)

Carburetor Barrels:

4-Barrel

Fuel Type:

Gasoline

Choke Type:

Electric

$649.95

/each

AutoMeter |

#1824353

Auto Meter 4353 Ultra-Lite Digital Stepper Motor Oil Pressure Gauge

Gauge Diameter:

2-1/16"

Gauge Series:

Analog

Gauge Style:

Stepper

$282.99

/each

AutoMeter |

#1823384

AutoMeter 3384 Sport-Comp Mechanical Vacuum Gauge, 2-1/16 Inch

Overall Diameter:

2-1/16"

Gauge Type:

Mechanical

Gauge Range:

0-30 IN HG

$86.99

/each

AutoMeter |

#1821321

AutoMeter 1321 Arctic White Mechanical Oil Press. Gauge

(2)

Gauge Diameter:

2-1/16"

Gauge Series:

Analog

Gauge Style:

Mechanical

$98.99

/each

Showing 1 - 432 of 5,570 results

Shop Feedback:

Did you find what you are looking for?

International L121 Engine Parts

Year

Subcategory

Part

Brand

Transmission Family

Availability

Engine Family

Discounts

Price

Customer Rating

Products

Earls AT700145ERL Super Stock Straight -4 AN Female to 1/4 Inch Barb

Earls AT915186ERL Straight -8 AN to -6 AN Female Swivel Coupling

Earls AT992908ERL Aluminum -8 AN Flare Fitting Cap, Black

Earls 754156ERL Vapor Guard 45 Deg Hose End -6 to 5/16 Inch

Driven Racing Oil 26156 Circle Track Synthetic Oil 10W50, 12 Qts

Related Articles

Mr Gasket 1485 Flat Top Dual Quad Air Cleaner

Russell 662031 Endura Finish Aluminum Pipe Plug-1/8 In NPT

Vibrant Bellmouth Velocity Stack, Aluminum, 3-5 Inch Inlet

Vibrant HD Pinless Charge Tube Clamp Assembly, Black

Earls SS982203ERL 90 Degree Elbow, -3 AN Male to 1/8 Inch NPT

ICT BILLET 551474-1 A/C Compressor Bracket Kit, Sanden 508, LS

Speedway Replacement EPR2 O-Rings for -16 AN Fittings, Pack/5

Turbosmart TS-0204-1132 RacePort GenV Blow Off Valve, Black

Driven Racing Oil 22408-4 10W40 Crate Engine Oil 4X1 Gallon

Maxima 89-83964 Off Road Coolant, 64 OZ Bottles, Qty 6

Magnuson Superchargers 31-26-59-003 Belt Tensioner And Hardware

Vibrant 12780 Gen3 Catch Can Reservoir, Small

Vibrant 12781 Gen3 Catch Can Reservoir, Medium

Vibrant 12760 Gen3 Catch Can Assemblies, Small, 2 Port

LS Crossover Delete Kit

PSI Conversion Multec LS Truck Injector Adaptor

Aeroquip FBM3414 Stainless Steel Hose Support Coil, -16 AN

VS Racing T763VCL Turbocharger Discharge Flange/Clamp

Goodridge AN921-10D 90 High-Flow O-Ring -10 AN Hose to Port Fitting

Kevko K-128NPT K128 17 Inch Universal Dipstick, 1/4 Inch NPT

Ideal Heavy Duty T-Bolt Clamp, 1-7/8 Inch Minimum Clamping Diameter

Lucas Oil 10847 Synthetic 2-Cycle Snowmobile Oil, Gallon, Case/4

Steel -10 AN Fitting for Aeroquip FC300 High Pressure Hose, Straight

Magnuson Superchargers 79-83-00-680 680m Rear Cog Belt TVS2650

Earls 679110ERL 90 Degree -10 AN Tube Hose End

Aluminum Flare to Pipe Tee on Run Fitting, AN4 to 1/8 Inch NPT

Edelbrock 8080 Pipe to Hose Barb Fitting, 1/4-18 NPT X 3/8

Edelbrock 1409 Marine Series 4BBL 600 CFM Carburetor

Auto Meter 4353 Ultra-Lite Digital Stepper Motor Oil Pressure Gauge

AutoMeter 3384 Sport-Comp Mechanical Vacuum Gauge, 2-1/16 Inch

AutoMeter 1321 Arctic White Mechanical Oil Press. Gauge