Set of 8 UF413 Square Ignition Coils Pack with Spark Plugs and Wires

Our review of this Set of 8 UF413 Square Ignition Coils Pack with matching spark plugs and wires finds it best suited for owners who need a full ignition refresh for compatible GM V8 engines. The package bundles eight UF413-style ignition coils, eight spark plugs with an OEM 0.04 in (1.02 mm) gap, and eight high-temperature silicone spark plug wires plus wire separators, so the single biggest reason to buy is convenience: replacing coils, plugs, and wires together removes diagnosis guesswork and restores a complete ignition system in one service job.

Key Features

• Complete kit: Includes eight ignition coils, eight spark plugs, eight spark plug wires and two 4-slot wire separators so a full bank of cylinders can be serviced in one visit.
• UF413 coil construction: Uses epoxy resin adhesive and pure copper coils to withstand heat and vibration for consistent spark delivery under heavy loads.
• OEM plug gap: Spark plugs are preset to an OEM design standard 0.04 in (1.02 mm) gap for correct ignition timing and easier installation.
• High-temp wires: 7 mm thick silicone wires rated from -40C to +200C reduce voltage leaks and resist heat better than EPDM alternatives.
• Wide vehicle coverage: Specified fit for many Chevy, GMC and Cadillac V8 applications so the kit covers common Silverado, Tahoe, Suburban and Escalade engines.

Who It's For

This kit is for DIY mechanics and professional technicians who want a full ignition component replacement for GM V8 engines (4.3L, 4.8L, 5.3L, 6.0L and select 6.2L/7.0L models) that match the listed part numbers. It suits vehicles that show multiple-cylinder misfires, rough idle, or where coils and wires are aged or corroded and a complete overhaul is preferred.

Those who should look elsewhere include owners of non-GM engines or vehicles whose original parts do not match the shown OE numbers; the listing stresses careful comparison of pictures and OE numbers before purchase to avoid fitment mistakes.

Pros & Cons

Pros

• Good value for a full eight-cylinder ignition service since coils, plugs and wires are bundled together.
• Durable materials in coils and silicone wires offer improved heat resistance and reduced voltage leakage.
• Pre-gapped spark plugs and included wire separators simplify installation and help ensure correct routing.

Cons

• Mixed customer feedback on long-term performance, with some reports of misfires and corrosion over time, so results may vary by vehicle and environment.

Specifications

Our Verdict

This set is a practical, cost-effective option for owners of compatible Chevy, GMC and Cadillac V8 models who want to replace an entire ignition bank at once. It pairs OEM-style plugs and robust coils with high-temp silicone wires, offering good value and straightforward installation, though buyers should verify OE numbers and be aware that some users report variable longevity and occasional corrosion issues.

Frequently Asked Questions

Will these fit my Silverado?
Check the listed vehicle years and part numbers; the kit fits many Silverado 1500/2500/3500, Suburban, Tahoe and Express models with the specified engine sizes.

Are the spark plugs pre-gapped?
Yes, the spark plugs are preset to an OEM gap of 0.04 in (1.02 mm) and inspected during the delivery process.

Do the wires resist high temperatures?
Yes, the 7 mm silicone wires are rated from -40C to +200C and are more heat resistant than typical EPDM wires.