---
product_id: 589834401
title: "MAS Ignition Coils DG521 and Motorcraft SP-509 Spark Plugs compatible with Ford Expedition F-150 Super Duty F-250 F-350 F-450 F-550 F-350 F53 4.6L 5.4L 6.8L C1659 DG521 8L3Z-12029-A"
brand: "mas"
price: "1626.37 DT"
currency: TND
in_stock: true
url: https://www.desertcart.tn/products/589834401-mas-ignition-coils-dg521-and-motorcraft-sp-509-spark-plugs
store_origin: TN
region: Tunisia
---

# High energy output ignition Heat-resistant coil boots Direct OEM fit & easy install MAS Ignition Coils DG521 and Motorcraft SP-509 Spark Plugs compatible with Ford Expedition F-150 Super Duty F-250 F-350 F-450 F-550 F-350 F53 4.6L 5.4L 6.8L C1659 DG521 8L3Z-12029-A

**Brand:** mas
**Price:** 1626.37 DT
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite your drive with power and precision!

## Quick Answers

- **What is this?** MAS Ignition Coils DG521 and Motorcraft SP-509 Spark Plugs compatible with Ford Expedition F-150 Super Duty F-250 F-350 F-450 F-550 F-350 F53 4.6L 5.4L 6.8L C1659 DG521 8L3Z-12029-A by mas
- **How much does it cost?** 1626.37 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/589834401-mas-ignition-coils-dg521-and-motorcraft-sp-509-spark-plugs)

## Best For

- mas enthusiasts

## Why This Product

- Trusted mas brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Upgrade:** Direct replacement coils and spark plugs for hassle-free installation
- • **Optimized Combustion:** Low-emission design boosts fuel efficiency and reduces environmental impact
- • **Durability Under Fire:** High-heat resistant boots engineered to withstand extreme engine temperatures
- • **Precision Engine Match:** Tailored for Ford 4.6L, 5.4L & 6.8L engines ensuring peak performance
- • **Trusted OEM Compatibility:** Fits a wide range of Ford models with multiple verified part numbers

## Overview

This MAS ignition coil and Motorcraft SP-509 spark plug combo is engineered for Ford trucks and SUVs (2008-2014) with 4.6L, 5.4L, and 6.8L engines. Featuring high-heat resistant boots and direct OEM fitment, it delivers reliable high-energy ignition for improved fuel efficiency and reduced emissions. Backed by a one-year limited warranty, it’s the smart upgrade for serious Ford enthusiasts.

## Description

Ignition Coils DG521 and Motorcraft SP-509 Spark Plugs compatible with Ford Expedition F-150 Super Duty F-250 F-350 F-450 F-550 F-350 F53 4.6L 5.4L 6.8L C1659 DG521 8L3Z-12029-A

## Features

- 【Important Notes】--Please check your original coil boots color before purchase. Because the manufactures of the vehicles changed their coils mid-year so your vehicle might need the DG521 (Brown boots) or DG511 (Black boots) Coils depending on what month the vehicle was made in. If you OEM coil is brown boots this is the one you need. If you OEM coil is Black boots, B0743LRJ7L that is the one you need.
- 【Direct Replacement】--the ignition coils are easy to install, it use the high grade materials, and each coil is design for specific application, low-emissions, high energy output. High heat resistant compound for our ignition coil on plug boot to withstanding heat stress for longer durability.
- 【Vehicle Fitment】--Replacement for 2009-2014 Ford Expedition,2008-2010 Ford Explorer,2008-2010 Ford Explorer Sport Trac,2008-2010 Ford F150,2008-2010 F250 Super Duty,2008-2010 F350 Super Duty,2008-2010 Ford Mustang,2008 Lincoln Mark LT,2008-2014 Lincoln Navigator,2008-2010 Mercury Mountaineer
- 【Compatible Part Numbers】--C1659, DG521, FD-509, 5C1716, 8L3Z-12029-A, C1659, GN10233, 5C1716, E509, 52-2071, IC697,SP509
- 【Warranty】--MAS Performance Ignition Coils With Motorcraft spark plugs SP509,made of high quality,one year limited warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | MAS |
| Brand | MAS |
| Package Dimensions | 28.5 x 24.99 x 9.3 cm; 1.81 kg |
| Manufacturer reference | DG521SP509 |
| Manufacturer Part Number | DG521SP509 |
| OEM Part Number | C1659, DG 521, FD-509, 5C1716, 8L3Z12029A / 8L3Z-12029-A, C1659, GN10233, 5C1716, E509, 52-2071, IC697, 8L3Z-12029-A, HJFS-24FP, SP-509, SP509 |
| Item Weight | 1.81 Kilograms |

## Product Details

- **Brand:** MAS
- **Vehicle service type:** Car, Van
- **Item weight:** 4 Pounds
- **Connector gender:** Female-to-Male
- **Installation type:** Bolt-On or Screw-In

## Images

![MAS Ignition Coils DG521 and Motorcraft SP-509 Spark Plugs compatible with Ford Expedition F-150 Super Duty F-250 F-350 F-450 F-550 F-350 F53 4.6L 5.4L 6.8L C1659 DG521 8L3Z-12029-A - Image 1](https://m.media-amazon.com/images/I/71PyrTbUfxL.jpg)

## Questions & Answers

**Q: Is there a warranty?**
A: One year limited warranty for replacement only.

**Q: What size socket size do i need**
A: These require a 7mm socket. be sure to get an extension or a deep well to have room to maneuver.

**Q: Are they double platinum ?**
A: Yes, for SP509 ,it is Double Platinum spark plug.

**Q: Anyone know if these plugs have any issues? I know 5.4 motors were bad. if you had an easy experience replacing olugs or a bad experience please respo**
A: They changed head design in mid 2008

So end of 2008 and newer they are fine and no worse than changing plugs on anything else. 

This is the updated design. Ford noted the new design by using brown coil boots. So you would have to pull one to find out if you have new or old style. 
Black boots is the 2 piece.

## Frequently Bought Together

- MAS Set of 8 Ignition Coils Brown boots DG521 and Motorcraft SP-509 Spark Plugs Compatible with Ford Expedition F-150 Super Duty F-250 F-350 F-450 F-550 F53 4.6L 5.4L C1659 DG521
- Permatex 22058 Dielectric Tune-Up Grease, 3oz. - High Performance Dielectric Grease Used To Protect Terminals, Spark Plugs, Wiring And Other Electrical Connections Against Salt, Dirt, And Corrosion
- LEXIVON 9/16-Inch Spark Plug Swivel Socket, 3/8" Drive x 6" Total Length | Enhanced Magnetic Design with Thin Wall Socket, Cr-v Steel (LX-SSPS9166)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-03-15*