SPARKWHIZ UF413 Square Ignition Coil Kit with 8mm 748UU Wires, Set of 8 — German Copper

How will these coils and wires improve engine performance?

Upgraded coils and high-quality spark plug wires provide a steadier high-voltage path to the plugs, helping maintain a reliable spark under varied driving conditions. That steady spark can reduce misfires and restore ignition responsiveness when old coils or brittle wires begin to fail.

• Stronger, more consistent discharge energy than many aged OEM coils.
• German copper coil windings for stable conductivity.
• 8mm OE-style wires minimize signal loss and interference.
• Durable polyester rubber wrapping resists heat and abrasion.

Will this kit fit my vehicle and how do I confirm compatibility?

This set is compatible with vehicles that use the UF413 (D510C/D513A) square-style coil; it lists multiple OEM cross-reference numbers to help match fitment. Use your year/make/model and the interchangeable part numbers, or visually compare your existing coils to ensure you need the square-body UF413 rather than the round UF414 style.

• Check OEM numbers: C1511, UF413, D510C, D513A, 5C1554, IC533, and others.
• Compare coil shape: square-body UF413 vs round-body UF414.
• Use the fitment selector on the product page or compare original parts directly.
• Compatible with select Cadillac, Hummer, Chevrolet, and GMC models—verify fit before purchase.

What should I know about installation and care?

Installation is straightforward for anyone familiar with basic ignition work, but taking a few precautions helps avoid damage and ensures a tight fit. Use a silicone spray when assembling to reduce rubber cracking and follow torque and connection guidance from the vehicle manufacturer.

• Spray silicone on rubber parts during assembly to prevent cracking.
• Use original tools where recommended for safe disassembly and reassembly.
• Ensure secure electrical connections and correct wire routing to avoid chafing.
• Inspect boots and connectors for a snug, corrosion-free fit before starting the engine.

How durable are these coils and wires?

The UF413 coils in this kit are built for longevity with high-quality copper windings and protective polyester rubber wrapping. The included 8mm 748UU wires follow OE standards to resist heat and wear, offering reliable service across varied driving conditions.

• German copper windings for improved conductivity and stability.
• Polyester rubber wrap to resist heat, oil, and abrasion.
• OE-style wires designed for long-term flexing and vibration resistance.
• Manufactured to withstand common automotive under-hood stresses.

This kit suits DIY mechanics, professional technicians, and vehicle owners who need a full eight-coil replacement with matching spark plug wires. It’s ideal for cars and trucks that specifically require the UF413 square-body coil form factor and want a durable, OEM-compatible upgrade to restore ignition reliability without complicated modifications.