# Cloyes S421 Crankshaft Sprocket for 1972-1987 Ford Custom

### Specifications

Adjustable: No

Chain Row Quantity: 1

Color: Gray

Inside Diameter: 1.38"

Keyway Notch: Yes

Material: Metal

Meets or Exceeds Original Equipment Manufacture Specifications: Yes

Mount Hole Diameter: 1.38"

Mount Hole Quantity: 1

Original Equipment Replacement: Yes

Outside Diameter: 2.82"

Thickness: 0.79"

Tooth Quantity: 18

Tooth Width: 0.52"

Universal or Specific Fit: Specific

### Features

-   Made with precision and quality in mind
-   Designed to meet your specific needs
-   Manufactured to meet or exceed strict quality requirements
-   Designed to deliver trouble-free, consistent performance

### Product Details

Crankshaft Sprocket (S421) by Cloyes®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit for a hassle free installation, this reliable product can help you get you vehicle back on the road faster and easier.

Brand: Cloyes

Part Number: S421

UPC: 750385102867

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

1972-1973, 1975-1976

Ford

Custom

1975-1987

Ford

E-series

1973-1974, 1979

Ford

F-100

1975-1979

Ford

F-150

1973-1979, 1983-1987

Ford

F-250

1973-1979, 1983-1987

Ford

F-350

1972-1973

Ford

Galaxie

1972-1973, 1975-1976

Ford

LTD

1974-1977

Ford

Ranchero

1972-1973, 1975-1976

Ford

Thunderbird

1972-1973, 1975-1976

Ford

Torino

1972-1978

Lincoln

Continental

1972-1976

Lincoln

Mark IV

1977-1978

Lincoln

Mark V

1973-1976

Mercury

Cougar

1975-1978

Mercury

Grand Marquis

1972-1976

Mercury

Montego

1972-1974

Mercury

Monterey

### FAQ

**Will this fit my vehicle?**  
Please verify your year, make, model, position, and any fitment notes using the Vehicle Fitment Table above before purchase.

**What part number is this?**  
The listed part number is S421.

**Is this product designed for direct replacement?**  
Yes. This product is intended to match the compatible vehicle applications listed in the fitment table.

**Should I confirm fitment before ordering?**  
Yes. Always compare your original part, position, and vehicle details with the fitment table before ordering.

### Common Searches

-   Crankshaft Sprocket for Ford Custom
-   S421 fitment
-   Cloyes Crankshaft Sprocket
-   1972 Ford Custom Crankshaft Sprocket

## Details

- **Price:** 9.7 CAD
- **Vendor:** Cloyes
- **Type:** Crankshaft Sprocket
- **Tags:** 1972-1973, 1972-1973 Ford Galaxie, 1972-1974 Mercury Monterey, 1972-1976 Lincoln Mark IV, 1972-1976 Mercury Montego, 1972-1978 Lincoln Continental, 1973-1974, 1973-1976 Mercury Cougar, 1973-1979, 1974-1977 Ford Ranchero, 1975-1976 Ford Custom, 1975-1976 Ford LTD, 1975-1976 Ford Thunderbird, 1975-1976 Ford Torino, 1975-1978 Mercury Grand Marquis, 1975-1979 Ford F-150, 1975-1987 Ford E-series, 1977-1978 Lincoln Mark V, 1979 Ford F-100, 1983-1987 Ford F-250, 1983-1987 Ford F-350, Automotive, Cloyes, Crankshaft Sprocket, S421

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 9.70 CAD | In stock |

## Images

- Cloyes S421 Crankshaft Sprocket for 1972-1987 Ford Custom

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/cloyes-s421-crankshaft-sprocket)
> Updated: 2026-08-18