SPARKWHIZ Ignition Coils Kit Set of 8 — UF413 Direct-Fit with Iridium Plugs & 8mm Wires, Plug-and-Play

SPARKWHIZ Set of 8 UF413 Ignition Coils Pack & Spark Plugs & Wires Set is a complete plug-and-play ignition kit designed to replace worn factory coils, plugs, and leads for a stronger, more consistent spark.

This kit bundles eight UF413 direct-fit ignition coils with iridium spark plugs and 8mm OE-standard spark plug wires so you can replace the entire ignition circuit in one service. Each component matches common OEM reference numbers (C1511, UF413, D510C, D513A, 5C1554, IC533, 12570616, 12611424 and others) and is engineered for durability in everyday driving and higher-demand conditions. The coils use copper windings and polyester rubber insulation, the plugs feature iridium electrodes, and the wires follow OE specifications for plug compatibility and routing.

How will this SPARKWHIZ kit improve ignition performance?

Upgrading all three ignition components at once restores original spark energy and consistency across cylinders. New coils deliver higher discharge energy than many aged factory units, iridium plugs sustain stable sparks at high temperatures, and fresh wires reduce electrical leakage.

• Higher discharge energy for stronger spark per coil
• Iridium plugs provide durable electrodes and reliable ignition
• 8mm OE-style wires minimize misfires and crossfire
• Complete set replaces aging or mismatched parts for balanced firing

Will these parts fit my vehicle and how do I verify compatibility?

The kit is compatible with specific Cadillac, Hummer, Chevrolet, and GMC model years that use UF413-style coils. Fitment varies by engine and year, so always check your vehicle’s part numbers against the OEM references or enter the vehicle details in the fitment checker before ordering.

• Compare your current coil’s part number to C1511, UF413, etc.
• Use vehicle make, model, year, and engine to confirm fit
• Contact customer support with VIN for precise verification

How difficult is installation and what tools or tips help?

Installation is intended to be plug-and-play for technicians or experienced DIYers—coils, plugs, and wires mount in the factory locations and use existing harnesses. For a smooth installation, use the original tool when possible and lightly coat the coil’s rubber boots with silicone spray to prevent cracking during future disassembly.

• Recommended: original installation tools and a torque wrench for plugs
• Spray silicone on coil boots during assembly to protect rubber
• Replace one cylinder at a time to maintain correct firing order
• Check and clean spark plug wells before fitting new parts

What materials and quality features are included in the SPARKWHIZ components?

The UF413 coils use German-manufactured copper windings and are encased in polyester rubber for improved thermal and mechanical resistance. The iridium spark plugs have a high-melting-point electrode for long service life, while the 8mm wires follow OE dimensions for consistent routing and electrical insulation.

• Copper-wound ignition coils wrapped in durable polyester rubber
• Iridium spark plugs for extended electrode life and stable sparks
• 8mm OE-standard spark plug wires to reduce leakage and interference
• Manufactured to match common OEM reference numbers

Who is this for: The SPARKWHIZ Set of 8 UF413 Ignition Coils, Spark Plugs & Wires Set is aimed at owners and mechanics replacing multiple ignition parts at once—especially vehicles showing aging coils, misfires, or inconsistent performance. It’s ideal for those who want a complete, direct-replacement kit that restores even firing across all cylinders and reduces the chance of repeated failures from using mixed-age components.