For Mercury Grand Marquis 1998-2011 4.6L V8 Set of 8 Ignition Coil & 8 Spark Plugs Replacement for FD503 DG508 DG481 DG457 DG491 C1417

Product Details

🔹 Product Overview

This complete replacement kit includes 8 DG508 direct ignition coils and 8 iridium spark plugs, engineered as a direct OEM fit for compatible Ford, Mercury, Lincoln and VPG vehicles equipped with 4.6L / 5.4L V8 SOHC engines. Matching OEM part numbers DG508, SP493, SP479 and cross-referenced interchange part numbers ensure seamless plug-and-play installation without modifications.

🔹 OEM Interchange Part Numbers

Ignition Coil OEM Cross Reference: 
DG508, DG481, DG491, E213, E262, E409, F5235, 21761, FD-493, FD-503, FD507, IC369, IC62, 5C1412, 88921369, F7TU12029BA, F7TU12A366AB, F7TZ12029CC, F7TZ12029AB, F7TZ12029CA, 1L2U12029AA, 1L2Z12029AA, 1L5Z12029AA, 3W7E12A366AA, 3W7Z12029AA

Spark Plug OEM Cross Reference：
SP493, SP479

🔹 Compatible Vehicle List

🚗 Ford Vehicles

E-150  1997-2014  (5.4L V8)
E-150  2000–2014  (4.6L V8)
E-250  1997-2014  (5.4L V8)
E-250  2003–2014  (4.6L V8)
E-350  1997-2015  (5.4L V8)
E-450  2000-2004  (5.4L V8)
E-450  2006-2015  (5.4L V8)
Expedition 1997–2004  (5.4L V8)
Expedition 2000–2004  (4.6L V8)
Crown Victoria (Gas) 1998–2005  (4.6L V8)
Crown Victoria 2006–2011  (4.6L V8)
F-150  1997-2003  (5.4L V8)
F-150  2000-2007  (5.4L V8)
F-150  2008-2010  (16 Valve 4.6L V8)
F-150 Heritage 2004  (4.6L V8 / 5.4L V8)
F-250  1997–1999  (5.4L V8)
F-250  Super Duty  1999–2004  (5.4L V8)
F-350  Super Duty  1999–2004  (5.4L V8)
Mustang  1999 2001 2003 2004  (4.6L V8 SOHC)
Mustang  2000  (4.6L V8 / 5.4L V8)
Mustang  2002  (4.6L V8)
Econoline Super Duty  1997-1999  (5.4L V8)
Explorer  2002–2005  (4.6L V8)
Excursion  2000–2005  (5.4L V8)

🚗 Mercury Vehicles

Grand Marquis  1998–2011  (4.6L V8)
Mountaineer  2002–2005  (4.6L V8)

🚗 Lincoln Vehicles

Town Car  1998–2005  (4.6L V8)
Navigator  1998  (5.4L V8)
Navigator  1999  (5.4L V8 SOHC)

🚗 VPG Vehicles

MV-1  2011–2012  (4.6L V8)

🔹 Ignition Coil (DG508) Construction & Specs

• 2-Pin Rectangular Female Blade Connector: Matches factory wiring harness for error-free connection; avoids loose contact and intermittent spark failure.

• Integrated Mounting Hole: Bolt-on design aligns perfectly with original engine mounting positions for quick installation.

• High-Temp Silicone Curved Boot: Distinct curved boot design (unique to DG508, differentiates from straight-boot DG521 / DG511) resists cracking, oil leakage and heat aging.

• Full Epoxy Resin Housing: Blocks voltage leakage, insulates internal components and withstands extreme engine bay temperatures.

🔹 Official Specifications

1. Coil Type: Electronic Direct Ignition Coil

2. Terminal Type: Blade

3. Mount Style: Bolt-On

4. Connector Gender: Female

5. Terminal Count: 2

6. Connector Shape: Rectangular

🔹 Iridium Spark Plug Premium Features

• Isostatic Ceramic Insulators: Minimizes voltage drop to maintain steady spark delivery under heavy load.
  
  
• Ultra-Precision Factory Spark Gap: Pre-set gap eliminates manual adjustment, maximizes ignition efficiency and component lifespan.
  
  
• Stable Terminal Screw Cap: Stabilizes voltage transfer, reduces random misfires and sustains consistent engine performance.
  
  
• Debris-Free Precision Threads: Smooth machined threads prevent cross-threading during installation, creating tight, leak-free sealing.

🔹 Simple 5-Step Installation Guide

1. Disconnect vehicle battery and remove engine cover

2. Use standard wrench to loosen ignition coil mounting bolt

3. Unplug wiring harness connector and pull out old ignition coil

4. Install new DG508 coil and tighten mounting screw securely

5. Reconnect power plug, reattach engine cover and reconnect battery

⚠️Important Pre-Purchase Reminder

This kit only fits vehicles requiring the curved boot DG508 ignition coil. DO NOT purchase if your factory coil is straight-boot DG521 or DG511. Visually compare your original ignition coil shape and match OEM part numbers before ordering—similar-looking coils are not interchangeable.

🔹 Package Includes:

8 x DG508 Direct Ignition Coils

8 x Iridium Spark Plugs