APR Ignition Coil & Spark Plug Kit (4.0T EA824 8-cylinder engines) | KT100039

The APR Ignition Coil & Spark Plug Kit (KT100039) is a complete, performance-oriented ignition refresh for Audi 4.0T EA824 8-cylinder engines. This kit is a vital maintenance and performance upgrade for owners of the S6, S7, RS6, RS7, and A8/S8 looking to stabilize combustion and maximize output. By pairing APR High-Output Ignition Coils with APR Iridium Pro Spark Plugs, this system delivers a spark up to 6% more powerful than stock, ensuring reliable performance even under the extreme cylinder pressures of a tuned twin-turbo V8.

The included Heat Range 9 Iridium Pro Spark Plugs are engineered for high-heat and high-load conditions. Featuring an iridium electrode with a 152% higher melting point than silver, these plugs provide superior resistance to spark blowout and pre-ignition. This makes them the ideal choice for 4.0T owners running Stage 1, Stage 2, or upgraded turbocharger configurations where thermal management is critical.

Key Features:

• Matched V8 System: Includes 8 high-output coils and 8 iridium plugs designed to work in perfect harmony.
• 6% Energy Increase: Upgraded internal components deliver more spark energy than factory coils for more efficient combustion.
• Iridium Pro Electrodes: Requires less voltage to fire, ensuring a consistent spark as boost levels and cylinder pressures rise.
• Superior Heat Dissipation: Copper core construction and Heat Range 9 design allow for efficient cooling and resistance to pre-ignition.
• Direct Plug-and-Play: No wiring, coding, or special tuning required—installs exactly like the factory ignition system.
• Proven Reliability: Coils are batch-tested to over 15 million firings to ensure long-term durability under extreme stress.

Technical Specifications:

Compatibility & Cross-Reference:

• Engine Fitment: Audi 4.0T EA824 (S6, S7, RS6, RS7, A8, S8).
• OEM Spark Plug Cross-Reference: 06K905601B/D/K/M, 06Q905601E/L.
• OEM Ignition Coil Replacement: 06H905110G, 079905110L, 079905110N, 079905110P, 079905110R.

Fitment Note: Always visually confirm your factory connector and boot style before installation. While these are direct-fit for the EA824 engine, verifying spark plug gap and reach is recommended before final assembly.