SPARKWHIZ UF413 Square Ignition Coils + 8mm Wires | 8-Pack for Silverado, GMC & More

Upgrade Your Ignition with Confidence

Boost your vehicle’s ignition system with the SPARKWHIZ UF413 Square Ignition Coils paired with 8mm 748UU spark plug wires. This 8-pack is designed to replace UF413 and related part numbers, delivering a strong, reliable spark across a range of GM vehicles. Before buying, use the year/make/model selector or compare your original coils to confirm compatibility with your Silverado 1500, GMC models, Pontiac, and other supported platforms.

Engineered for durability and consistent performance, these coils pair a robust coil body with high-quality wiring to help maintain steady ignition energy under varied driving conditions. While individual results vary, drivers often notice crisper starts, smoother idling, and more predictable throttle response in daily driving and at higher load.

What You Get

• 8 high-performance UF413 ignition coils plus 8mm 748UU spark plug wires
• Direct plug-and-play compatibility with select Chevrolet, GMC, Cadillac, Hummer, and related models
• OEM part references included (e.g., UF413, D510C, 5C1554) to support proper identification
• Durable construction: German copper coil core wrapped in durable polyester rubber for lasting use

Why Upgrade

• Greater discharge energy can translate to a more powerful and consistent spark
• Solid build designed to endure demanding driving conditions and higher mileage
• Wires and coils are designed for reliable remote-distance firing and reduced misfire chances
• Plug-and-play design simplifies replacement for many GM-era vehicles

Installation Tips

• During assembly, spray a light coating of silicone spray on coil boots to minimize rubber wear during disassembly
• Use the original tool where possible to ensure a secure, proper fit

Real-World Use

Owners report a smoother engine feel and steadier idle after installation, with improved ignition consistency under load. This set is designed to support vehicles that expect reliable performance across a range of driving scenarios, from daily commuting to spirited highway merging. Remember, results can vary based on overall vehicle condition, maintenance history, and fueling quality.