Ignition Coil & Spark Plug for Chevy Express 1500 2500 3500 Van (2008-2016) V8 (Round Style)

High-Energy Round Style Ignition Coil & Spark Plug Kit for 2008-2016 Chevrolet Express

What it Does: Provides a complete, direct-fit ignition system overhaul featuring round-style coil packs that deliver a 20% increase in discharge energy over factory specifications to prevent misfires and optimize combustion.

The Stock GMT610 Ignition Weakness

The OEM GM Gen IV V8 ignition system, particularly in heavy-duty GMT610 applications like the Express van, is prone to thermal degradation over time. Constant exposure to high engine bay temperatures causes the internal coil epoxy to break down and the secondary windings to develop excessive resistance. This chronic heat soak leads to weak spark propagation, intermittent misfires under load, and reduced fuel efficiency. Furthermore, degraded factory spark plug wires often experience dielectric breakdown, allowing voltage to arc to the block rather than reaching the spark plug, resulting in a severe loss of power and poor drivability.

The Engineering Solution

This comprehensive tune-up kit addresses OEM deficiencies through upgraded materials and optimized coil internals. The round-style UF414/D514A replacement coils feature a heavy-duty epoxy construction and high-grade copper wire primary/secondary windings with a 61:1 turns ratio. This maximizes thermal resilience and lowers primary resistance to 0.660 ohms. Capable of generating a maximum voltage of 32,000 V, these coils deliver 20% more energy than standard OEM units for a stronger, more consistent spark. Paired with exact-match spark plugs (41962) and low-resistance 748UU plug wires, this system ensures maximum voltage transfer and complete combustion, restoring lost torque and eliminating rough idle. Note: Specifically engineered for GM V8s utilizing the round-style coils; incompatible with square-style (UF413/D510C) setups.

Technical Specifications

Compatibility

• Cadillac Escalade (Round Coil Equipped)
• Chevrolet Avalanche (Round Coil Equipped)
• Chevrolet Express 1500 / 2500 / 3500 (Round Coil Equipped)
• Chevrolet Silverado (Round Coil Equipped)
• Chevrolet Suburban (Round Coil Equipped)
• Chevrolet Tahoe (Round Coil Equipped)
• Chevrolet Trailblazer (Round Coil Equipped)
• GMC Savana (Round Coil Equipped)
• GMC Yukon (Round Coil Equipped)
• Hummer H3 (Round Coil Equipped)
• Note: Replaces OEM Part Numbers C1512, D514A, UF414, 5C1555, E894, 52-1820, IC534, 12573190, GN10165, 12570616, 12611424, 1788407.

The Chevrolet Heavy-Duty Standard

Engineered for the demands of hauling and fleet utility, this ignition upgrade restores the steadfast reliability and towing capability expected from your GM heavy-duty powertrain, ensuring smooth power delivery and maximizing uptime.