SPARKWHIZ DG508 Ignition Coil Pack & SP479 Iridium Spark Plug Set, Pack of 8 — High‑Energy Coils, Long‑Life Iridium

SPARKWHIZ DG508 coil pack and SP479 iridium spark plug set is a complete eight‑cylinder ignition upgrade designed to restore reliable spark delivery and help engines run smoother under load.

This kit combines eight DG508 high‑energy ignition coils with eight SP479 iridium spark plugs to replace worn OE components in compatible vehicles. The components are engineered for higher output, enhanced durability, and straightforward installation so you can address misfires, rough idle, or sluggish throttle response without chasing individual parts. Each coil uses heavy‑gauge copper windings, a thick silicone boot, and a ferrite‑cored stainless spring for stable performance, while the iridium plugs offer a long service life and consistent ignition characteristics.

How do these coils and plugs improve engine performance?

The DG508 coils deliver roughly 18.9% more energy than typical original equipment units, providing a stronger, more consistent spark. The SP479 iridium plugs maintain stable firing over many miles, lowering the chance of misfires and inefficient combustion. Together they help the engine run more responsively, especially under acceleration and electrical load.

• Higher coil output for a more reliable spark across cylinders
• Iridium electrode plugs resist wear and hold gap longer
• Reduced misfire risk during load or high RPMs
• Balanced ignition across all eight cylinders

Are these parts durable and suitable for harsh conditions?

Yes — the coil pack is built with high‑grade copper wire and a thick silicone boot to resist heat and oil exposure. A stainless steel spring with a ferrite core aids longevity and consistent conductivity. The iridium tip on the plugs is much harder than conventional materials, extending service intervals.

• Heavy copper windings for sustained electrical performance
• Silicone boots resist cracking and dielectric breakdown
• Ferrite core reduces electromagnetic interference and improves stability
• Iridium electrodes for extended wear life and reliable gaps

How easy is installation and what should I prepare?

Installation is straightforward for anyone familiar with basic engine maintenance: remove the old coils and plugs, fit the new plugs to the correct gap, then install the coils. The set ships with instructions, and dielectric grease is recommended at the boot to ensure a secure seal. If a coil doesn’t match your vehicle’s connector, contact the seller for guidance or replacement.

• Follow enclosed instructions and torque specs for plugs
• Use dielectric grease on boots to prevent moisture and arcing
• Verify connector type before final installation
• Spares provided as a full set for all eight cylinders

What warranty and compatibility information should I know?

This eight‑pack carries a two‑year or 24,000‑mile warranty covering defects or premature failure; contact SPARKWHIZ for replacement within the warranty window. The listing includes multiple compatible part numbers to help confirm fitment—always double‑check against your vehicle’s OEM numbers or service manual before ordering.

• 2 year / 24,000 mile limited warranty for replacement
• Includes many cross‑reference part numbers for fit checks
• Sold as a complete set for eight cylinders to ensure matched performance
• Customer support available for fitment questions or returns

Who is this for: drivers and home mechanics who need a full, matched ignition refresh for V8 or eight‑cylinder engines seeking improved starting, smoother idle, and reduced misfires. It’s ideal for owners replacing aging coils and plugs at scheduled service intervals or addressing intermittent ignition faults, and for shop technicians who prefer a single compatible kit to service all cylinders quickly.