Ignition Coil & Spark Plugs for Pontiac GTO (2004) 5.7L V8

High-Output Ignition Coil & Spark Plug Kit for Pontiac GTO

Direct Replacement & Upgrade: Replaces failing factory ignition components to restore proper spark delivery, eliminate misfires, and ensure consistent voltage output across the RPM range.

The Stock LS1 Ignition Shortcomings

The factory D580-style ignition coils on early LS1 engines are notoriously susceptible to thermal degradation and heat soak, especially given the cramped engine bay of the V-Body chassis. Over time, constant thermal cycling causes the internal epoxy resin potting compound to degrade, leading to micro-cracks in the coil housing. This breakdown creates internal arcing, erratic secondary voltage drops, and high-RPM misfires, ultimately robbing the 5.7L of its smooth power delivery and accelerating spark plug fouling under load.

The Engineering Solution

This comprehensive tune-up kit addresses the OEM thermal vulnerabilities by utilizing upgraded high-temperature copper windings and an advanced dielectric epoxy designed for severe thermal environments. The re-engineered primary and secondary bobbins provide superior magnetic flux coupling, ensuring maximum energy transfer and a hotter, more consistent spark. Paired with high-grade silicone spark plug wires that resist pinhole leaks, cracking, and EMI/RFI interference, this setup guarantees a complete combustion event. The result is a stabilized idle, restored throttle response, and optimized low-emissions output.

Technical Specifications

Compatibility

• 2004 Pontiac GTO 5.7L V8

The Pontiac Muscle Caliber

For an iconic modern muscle car like the LS1-powered GTO, maintaining peak electrical performance is critical. Upgrading your ignition system ensures that the legendary torque and aggressive V8 exhaust note remain uninterrupted by weak spark or cylinder misfires, keeping the power reliable on the street and the strip.