SPARKWHIZ DG508 Ignition Coil & Iridium Spark Plug Kit – Pack of 8, High-Energy Output

SPARKWHIZ DG508 ignition coil pack paired with SP479 iridium spark plugs is an 8-piece replacement kit engineered to restore ignition energy and consistent combustion for compatible engines.

This complete kit bundles eight high-energy ignition coils with eight precision iridium spark plugs to address misfires, rough idle, and reduced throttle response in vehicles that accept DG508 and SP479-style parts. Each coil is wound with high-grade copper, sealed with a thick silicone boot, and uses a stainless steel spring with ferrite core for stable performance under load. The iridium plugs are designed for reliable spark and long life, helping maintain fuel burn efficiency between service intervals.

How much more ignition energy does this kit provide?

These SPARKWHIZ coils deliver noticeably higher output than many standard OEM units, helping strengthen the spark under demanding conditions. That extra energy can improve ignition reliability when the engine is working hard.

• Approximately 18.9% higher energy output versus conventional OE coils.
• Ferrite-core and stainless-steel spring for steady spark transfer.
• Thick silicone boot reduces arcing and environmental intrusion.

Will these parts fit my vehicle and what numbers match?

The kit is designed to replace a wide range of compatible OEM references — check the listed cross-reference numbers against your vehicle’s service manual or existing parts. If you’re unsure, compare the part numbers or contact SPARKWHIZ support before installation.

• Directly compatible references include DG508, DG491, FD503 and many others.
• Also cross-matches numerous manufacturer part numbers (see full list in product details).
• Contact seller support if the coil form or connector differs from your original unit.

How difficult is installation and what tools or supplies are recommended?

Installation is straightforward for anyone comfortable with basic engine maintenance and following a service guide. Each coil and spark plug will replace one cylinder’s ignition components; take care to torque plugs and secure coil bolts to factory specifications.

• Follow provided instructions and vehicle torque specs for plugs and coil fasteners.
• Dielectric grease is recommended on boot faces to ease future removal and prevent moisture intrusion.
• Typical tools: socket set, torque wrench, anti-seize (if desired), and a safe jack/ramps if needed for access.

What durability and warranty coverage come with this set?

SPARKWHIZ designed these coils for longevity using robust materials and thermal-resistant components to withstand engine bay conditions. The set includes limited warranty coverage to protect against premature failures within the coverage window.

• High-grade copper wire and reinforced construction for extended service life.
• Resistant silicone boot and corrosion-resistant internal parts.
• Comes with a 2-year or 24,000-mile warranty for replacement if failures occur.

Who this set is for: This SPARKWHIZ DG508 coil pack and SP479 iridium spark plug 8-piece kit is ideal for DIY mechanics, professional technicians, and vehicle owners with engines that use these replacement references. Choose this kit if you need a complete cylinder-by-cylinder ignition refresh, want higher spark energy under load, or are replacing worn coils and plugs at once to restore smooth idle and dependable throttle response. Always verify part compatibility with your vehicle before ordering and keep the installation instructions handy for best results.