SPARKWHIZ DG508 Ignition Coil Pack & Iridium Spark Plug Kit — Pack of 8, High‑Energy 18.9% Boost

SPARKWHIZ DG508 ignition coil pack paired with SP479 iridium spark plugs is an 8‑piece ignition replacement kit engineered to restore dependable spark energy and consistent firing across all eight cylinders.

If your engine is misfiring, running rough at idle, or losing power under load, worn coils and spark plugs are common culprits. This kit combines high‑energy ignition coils with long‑life iridium plugs so you replace both components at once, simplifying maintenance and helping return the ignition system to factory‑level performance.

How much more energy do these coils provide compared to standard OE parts?

These SPARKWHIZ coils deliver roughly 18.9% more electrical energy than typical original‑equipment coils, improving spark intensity without modifying the vehicle. The increased output helps maintain combustion stability especially during high load or acceleration.

• 18.9% higher energy output than conventional OE coils
• Ferrite core and stainless spring for stable spark delivery
• Thick silicone boot for better insulation and reduced leakage

Are these parts durable and reliable for long‑term use?

The coils use high‑grade copper windings, a ferrite core and a stainless steel return spring to resist heat and electrical degradation, while the iridium spark plugs are designed for extended electrode life. Together they offer a longer service interval compared with many economy replacements.

• High‑grade copper wire for improved conductivity
• Durable silicone boots to withstand heat and oils
• Iridium plugs for slower electrode wear and consistent gaps

How easy is installation and what should I prepare?

Installation is straightforward for anyone comfortable with basic engine work: remove the old coil and plug, fit the new plug into the cylinder head, then snap the coil down over the plug. The kit includes instructions; dielectric grease is recommended on boots to prevent moisture intrusion and ease future removal.

• Follow the included step‑by‑step installation guide
• Use dielectric grease on coil boots for improved sealing
• Confirm compatibility with listed part numbers before fitting

Which vehicles and part numbers does this set match?

This pack is engineered to match a variety of OEM coil and plug references—use the cross‑reference list to confirm fitment for your make and model. If you see a mismatch between the kit and your old coil, contact SPARKWHIZ for support before installation.

• Includes cross‑references like DG508, DG491, FD503 and many OEM codes
• Pack of 8 coils and plugs for V6/V8 engines requiring eight units
• Contact support if part differences are observed during fitment

Who is this for: This 8‑piece SPARKWHIZ ignition coil and iridium plug set is intended for DIY mechanics and professional technicians replacing all eight ignition assemblies at once—ideal for vehicles experiencing misfires, poor throttle response, or reduced engine smoothness where the listed cross‑reference numbers match. The included two‑year/24,000‑mile warranty provides added confidence for customers wanting a comprehensive ignition refresh without sourcing individual components separately.