ENA 8-Pack Round Ignition Coil Kit with Iridium Spark Plugs & Wires — Plug-and-Play for GM V8s

ENA's 8-pack round ignition coils bundled with eight iridium spark plugs and matching plug wires replace worn ignition components on many GM V8 trucks and SUVs for reliable spark delivery and straightforward plug-and-play installation.

If your Chevy or GMC V8 is showing rough idle, misfires, or reduced throttle response, replacing the ignition coils, spark plugs, and wires as a kit can restore consistent combustion. This ENA kit includes eight round UF414-style coil packs (verify your original coils are round UF414 — not square UF413), eight iridium-tipped spark plugs, and an eight-wire silicone-insulated set engineered to match factory routing and reach. The components are designed for direct replacement on a range of Silverado, Sierra, Tahoe, Suburban, Yukon, Avalanche, Camaro and select HD/Corvette/Impala models listed in the fitment notes.

How do I confirm these coils will fit my vehicle?

Before ordering, visually confirm your current coil housing shape and match part references. The ENA kit uses the round UF414 coil body; square UF413 coils are incompatible.

• Check coil body shape on the valve cover — must be round UF414.
• Cross-reference OEM numbers: 12573190, 5C1555, IC534, GN10165.
• Use the vehicle-year-model fitment list or your VIN in confirmation tools.
• Verify spark plug thread and gap specs for your engine (14 mm thread, 1.0 in gap for this kit).

What improvements should I expect after installing this kit?

Replacing worn coils, plugs, and wires can reduce misfires and improve throttle response, smoother idling, and more consistent starting. Gains depend on the condition of the original parts.

• Cleaner, more consistent ignition pulses from new UF414 coil packs.
• Long-life iridium center electrodes for stable spark and longevity.
• Silicone-insulated wires with fiberglass-reinforced cores reduce crossfire and leakage.
• Plug-and-play fit reduces install time compared with individual aftermarket parts.

How is quality specified for the spark plugs, wires, and coils?

Each component is built to match common OE dimensions and electrical characteristics so they can be installed without modifications. The kit includes technical specs to confirm compatibility and performance expectations.

• Coil pack specs: 12V, bolt-on mount, 4 terminals, engine-bay placement.
• Spark plug specs: iridium-platinum tip, 14 mm thread, 16 mm hex, 1.0 in gap.
• Wire specs: 8 mm diameter, silicone insulation, fiberglass-reinforced latex graphite core.
• Packaged as eight coils, eight plugs, eight wires plus a 12-month warranty.

What should I know about installation and service life?

The kit is engineered for straightforward replacement of like-for-like components and is suitable for DIY mechanics and professional shops. Service life will vary by driving conditions, but iridium plugs and properly sealed coils typically outlast standard copper plugs.

• Designed for bolt-on replacement with factory mounting points and electrical connectors.
• Follow torque specs for spark plugs and coil mounting; inspect wiring harness connectors.
• Replace all coils and wires in sets when multiple misfires or aging components are present.
• ENA provides a 12-month warranty for added confidence.

Who is this for? This ENA kit suits owners and technicians working on GM small-block and big-block V8 engines from approximately 2007–2016 who need a complete ignition refresh: eight matching round UF414 coil packs, eight iridium spark plugs, and eight plug wires. Ideal for Silverado and Sierra 1500/2500/3500 owners, Tahoe/Suburban/Yukon family SUVs, and compatible Camaro and other GM models listed in fitment notes who want a single-purchase replacement that aligns with factory specifications and reduces the guesswork of mixing separate parts.