Ignition Coil & Spark Plug for Chevy Monte Carlo (2006-2007) 5.3L V8 (Round Style)

High-Energy Ignition Coil & Spark Plug Kit for 2006-2007 Chevrolet Monte Carlo

Replaces deteriorating factory ignition components with a high-output 32,000V coil and matched plug setup to eliminate misfires, restore fuel efficiency, and ensure consistent spark delivery.

The Stock Monte Carlo LS4 Ignition Shortcomings

The factory GM D514A round-style coils and standard plug wires on the transverse 5.3L LS4 V8 are prone to thermal degradation over time. As the W-body engine bay experiences repeated heat cycling, the OEM coil epoxy breaks down, leading to internal short-circuiting. Furthermore, the stock primary resistance fluctuates as underhood temperatures rise, causing intermittent misfires, rough idle, and degraded throttle response, especially under load.

The Engineering Solution

This comprehensive ignition package integrates eight round-body UF414 coils, pre-gapped spark plugs, and durable 748UU plug wires to resolve these thermal vulnerabilities. The upgraded ignition coils feature advanced epoxy internal construction and superior copper wire internals, delivering a maximum voltage of 32,000V—a 20% increase in spark energy over original equipment. With a highly efficient 61:1 turns ratio and a primary resistance of 0.660 ohms, these direct-replacement 12V units ensure robust discharge energy, complete combustion, and long-term reliability.

Technical Specifications

Compatibility

• 2006-2007 Chevrolet Monte Carlo SS 5.3L V8 (LS4)
• Note: Only applicable to vehicles requiring round-style coils (UF414/D514A), not suitable for square coil (UF413/D510C) applications.

The Chevrolet Muscle Standard

Restoring the ignition system on your LS4-powered Monte Carlo ensures that iconic V8 power delivery remains uninterrupted. Reliable spark translates directly to smooth acceleration, optimal combustion, and maximum factory torque output.

Common Questions

Will this ignition kit fit my 2006-2007 Chevrolet Monte Carlo 5.3L V8?
Yes, this kit is a direct replacement for the 2006-2007 Chevrolet Monte Carlo equipped with the 5.3L LS4 V8 that uses round-body (UF414 / D514A) ignition coils.

What is included in this package?
The package includes eight round-style UF414 (D514A) 32,000V ignition coils, eight pre-gapped 41962 spark plugs, and a matched set of 748UU spark plug wires.

Can I use this kit if my Monte Carlo has square ignition coils?
This kit is built specifically for vehicles equipped with round-style coils (UF414 / D514A). Vehicles fitted with square-body coils require UF413 / D510C units.

What are the electrical specs on the upgraded coils?
Each 12V coil features copper wire internals and upgraded epoxy construction with a 0.660-ohm primary resistance, a 61:1 turns ratio, and a maximum output of 32,000V—delivering 20% more spark energy than stock.

Do the spark plugs come pre-gapped for installation?
Yes, the included spark plugs come pre-gapped and matched to the UF414 coils and 748UU wires for a direct factory-fit installation.