MAS Ignition Coil & Spark Plug Kit — Set of 8 Straight-Boot DG511 Coils with Motorcraft SP546 Platinum Plugs for Ford 5.4L V8 (200

Complete ignition tune-up kit: eight MAS straight-boot DG511 ignition coils paired with eight Motorcraft Platinum SP546 spark plugs designed for Ford 5.4L V8 engines (2004–2008 models).

This kit combines MAS replacement coil packs and Motorcraft platinum spark plugs to restore reliable spark, smoother idling, and consistent firing across all eight cylinders. It’s tailored for Ford Expedition, F-150, F-250/F-350 Super Duty, Lincoln Navigator and Mark LT models with the 5.4L V8 where straight-boot coils are specified. The set is intended as a full-cylinder replacement to prevent mismatched components and uneven wear, and it comes with a one-year limited warranty for added confidence.

How do these MAS DG511 coils and Motorcraft SP546 plugs improve engine performance?

Replacing old coils and worn spark plugs restores ignition consistency, reducing misfires and improving throttle response. New coils deliver stable voltage to each plug while platinum tips on the Motorcraft plugs hold gap tolerance longer than standard plugs.

• Full set of eight coils and eight plugs for cylinder-to-cylinder balance
• Straight-boot DG511 fitment for correct boot angle and sealing
• Platinum tip plugs resist erosion and maintain spark gap
• Compatible OEM cross-reference numbers ensure proper replacement

Which vehicles and model years are compatible with this ignition kit?

This kit fits Ford and Lincoln vehicles using the 5.4L V8 engine where straight-boot coils are required. Always verify coil boot shape (straight vs curved) and your vehicle production month/year to confirm exact compatibility.

• 2004–2008 Ford F-150 5.4L V8
• 2005–2008 Ford Expedition 5.4L V8
• 2005–2008 Ford F-250/F-350 Super Duty 5.4L V8
• 2006–2008 Lincoln Mark LT and 2005–2008 Lincoln Navigator 5.4L V8

What should I check before ordering to ensure the DG511 straight-boot coils fit?

Confirm whether your current ignition coil boots are straight or curved—DG511 is for straight boots while DG508 is for curved boots; DG521 fits brown boots. Also verify parts cross-reference numbers stamped on your existing coils or in the vehicle manual.

• Compare boot shape: straight (DG511) vs curved (DG508)
• Look for OEM numbers like 3L3E-12A366-CA, C1541, UF537 or FD508
• Check your vehicle production month/year for fitment nuances

How difficult is installation and what does the package include?

Installation is straightforward for anyone with basic mechanical skills and common hand tools; each coil replaces the existing coil atop the spark plug. The package supplies every cylinder component needed for a complete ignition service, minimizing part-sourcing errors.

• Includes: 8 MAS DG511 straight ignition coils + 8 Motorcraft SP546 platinum plugs
• One-year limited warranty for manufacturing defects
• Recommendations: replace all coils and plugs at once for optimal balance

Who this is for: This kit suits owners and technicians servicing Ford and Lincoln trucks/SUVs with the 5.4L V8 who need a full ignition replacement with OEM-referenced parts. It’s ideal for vehicles showing misfire codes, rough idle, poor throttle response, or for preventive maintenance where matching all eight cylinders matters. If your vehicle requires straight-boot coils and you want a complete plug-and-coil set that matches common OEM references, this MAS + Motorcraft bundle provides a practical, vehicle-specific solution.