Ignition Coil & Spark Plug for Pontiac G8 Grand Prix GTO (2005-2009) V8 (Round Style)

High-Output Ignition Coil & Spark Plug Set for 2005-2009 Pontiac G8, Grand Prix, GTO

What it Does: This comprehensive ignition service kit replaces degraded factory round-style D514A ignition coils, spark plugs, and wires to restore spark energy and eliminate misfires on LS-powered Pontiacs.

The Stock LS-Series Ignition Weakness

The OEM LS-series ignition coils—specifically the round-body variants—are notorious for degrading over time due to constant thermal cycling and localized engine bay heat soak. As the internal epoxy potting breaks down and the secondary resistance shifts, spark output diminishes drastically. This degradation leads to common V8 driveability issues, including rough idling, hesitation under heavy throttle, and high-RPM misfires. Furthermore, standard factory plug wires suffer from carbon core breakdown and insulation cracking, causing high-voltage leaks to the block that compromise combustion efficiency and sap overall horsepower.

The Engineering Solution

This complete ignition package overhauls the factory setup with coils featuring an optimized internal copper wire winding and a high-grade epoxy core to resist vibration and heat saturation. Designed with a 61:1 turns ratio and a peak maximum voltage output of 32,000V, these direct-replacement coils deliver 20% more discharge energy than standard OE components for a consistently stronger, fatter spark. Paired with low-resistance 748UU plug wires and matching spark plugs (41-962 spec), the system ensures a complete fuel burn, sharpens throttle response, and stabilizes the idle curve across all operating temperatures. Note: This kit specifically requires the round-style coil fitment (UF414/D514A) and will not fit square-style setups.

Technical Specifications

Compatibility

• Pontiac G8 (2008-2009, 6.0L L76 / 6.2L LS3 V8 with Round Coils)
• Pontiac Grand Prix (2005-2008, GXP 5.3L LS4 V8 with Round Coils)
• Pontiac GTO (2005-2006, 6.0L LS2 V8 with Round Coils)

The Pontiac Muscle Standard

Whether you are carving corners in a Zeta-platform G8 or laying down massive torque in an LS2 GTO, this upgraded ignition kit ensures your LS-powered muscle car maintains the raw horsepower, instantaneous throttle response, and aggressive exhaust note it was engineered for.

Common Questions

Which Pontiac V8 models does this ignition kit fit?
This kit fits the 2008-2009 Pontiac G8 (L76 and LS3 V8), 2005-2008 Pontiac Grand Prix GXP (LS4 V8), and 2005-2006 Pontiac GTO (LS2 V8) equipped with factory round-style UF414/D514A ignition coils.

What is included in this ignition service kit?
The package includes direct-replacement round-style ignition coils (UF414/D514A spec), low-resistance 748UU spark plug wires, and matching 41-962 spec spark plugs.

Will these coils fit an LS engine with square-body ignition coils?
This kit is built specifically for vehicles equipped with round-style UF414/D514A ignition coils. Verify that your factory coil packs have a round body before ordering.

How do these ignition coils compare to the factory OE coils?
They feature an optimized internal copper winding with a 61:1 turns ratio and a 32,000V peak output, delivering 20% more discharge energy than standard OE coils.

Do I need to modify my wiring harness to install this kit?
These coils, plug wires, and spark plugs are direct-replacement components engineered to plug right into the factory round-style LS ignition setup.