Ignition Coil & Iridium Spark Plugs for Audi S5 Coupe (2008-2012) 4.2L V8

High-Output Ignition Coil & Iridium Spark Plug Kit for 2008-2012 Audi S5

Direct replacement ignition service kit designed to restore optimal spark energy, eliminate misfires, and improve combustion efficiency in the 4.2L FSI V8.

The Stock S5 Ignition Shortcoming

The factory ignition coils on the B8 S5 are notoriously susceptible to premature degradation due to the intense thermal load generated by the 4.2L FSI V8 engine. As these coils heat cycle, the internal epoxy and secondary windings break down, leading to voltage leaks, sluggish throttle response, and cylinder misfires—especially under heavy load or acceleration. Combined with standard spark plugs that suffer from rapid electrode wear in high-compression direct-injection environments, the engine often experiences incomplete combustion, carbon buildup, and reduced fuel economy.

The Engineering Solution

This complete 16-piece ignition service kit addresses OE failures by utilizing high-grade internal copper wire windings that offer superior conductivity and resistance to high engine-bay temperatures. The upgraded ignition coils feature reinforced dielectric epoxy to prevent voltage punch-through and ensure a consistent, high-energy spark transfer. Paired with the included iridium-tipped spark plugs, which feature an extremely high melting point and a fine-wire center electrode, this setup provides a concentrated spark that requires less firing voltage. The result is a highly efficient burn capable of delivering up to a 15% increase in ignition performance and energy consistency, smoothing out idle, and restoring factory power delivery without triggering engine codes.

Technical Specifications

Compatibility

• 2008 Audi S5 Coupe 4.2L V8
• 2009 Audi S5 Coupe 4.2L V8
• 2010 Audi S5 Coupe 4.2L V8
• 2011 Audi S5 Coupe 4.2L V8
• 2012 Audi S5 Coupe 4.2L V8

The Audi Precision Standard

Engineered to meet or exceed strict OE criteria, this direct-fit ignition system guarantees precise timing and prevents CEL (Check Engine Light) issues, ensuring your European performance coupe runs with absolute reliability and maximum efficiency.