Marsram FD508 8-PCS Ignition Coil Pack for Ford 5.4L/4.6L V8

Overview

Marsram FD508 ignition coil pack is designed for V8 engines, delivering a consistent spark across eight cylinders. The black straight boots and sturdy housing stand up to heat, vibration, and everyday driving, helping to support reliable ignition in trucks and SUVs.

Fitment and model coverage

This eight-coil set is intended for 5.4L V8 and 4.6L V8 configurations and covers a broad range of Ford, Lincoln, and Mercury models from 2004 to 2008. Common installations include:

• Ford F-150 (2004–2008) 5.4L V8
• Ford Expedition (2005–2008) 5.4L V8
• Lincoln Navigator (2005–2008) 5.4L V8
• Lincoln Mark LT (2006–2008) 5.4L V8
• Ford F-350 Super Duty (2005–2008) 5.4L V8
• Ford F-250 Super Duty (2005–2008) 5.4L V8
• Ford Mustang (2005–2008) 5.4L V8
• Ford Explorer (2006–2008) 4.6L V8
• Mercury Mountaineer (2006–2008) 4.6L V8

Important notes for a precise fit

Important: This FD508 ignition coil fits V8 engines only (black straight boots exclusively). It is not compatible with V10 engines, brown or curved boots. Please verify your original coil’s appearance before ordering or reach out for fit confirmation.

What you get and build quality

• Eight high-performance ignition coils designed to replace worn units in the listed engines
• Durable construction built to withstand heat, vibration, and road conditions
• Replaces multiple part numbers including FD508, C1659, C1541, and DG511, among others
• 1-year warranty backed by quality testing and support

Real-world use and next steps

In everyday driving, a fresh FD508 set can help maintain a steady spark, support smooth idle, and contribute to reliable starting in V8-powered trucks and SUVs. On longer trips or when towing, consistent ignition can align with steady performance. Results vary by vehicle, but this coil pack offers a straightforward upgrade path for compatible models.

Before you buy, use the Parts Finder or contact us to confirm fitment against your exact trim and engine configuration. When installed correctly, you can expect a clean, factory-style appearance and plug-and-play replacement that aligns with OEM electrical standards.