NGK BKR7EIX Iridium Spark Plugs - Ideal for 2.0 TFSI s18x The M135i is shipped from

The M135i is shipped from the factory with a muted exhaust sound leading to a very disappointing driving experience

Improved resistance to spark blowout under high boost

Ford Galaxy - ANU 90 / AUY

5db increase in sound levels when idle

Example of the Cobra Sport Audi TTS (Mk3) Quattro Sports Exhaust (cat back system with louder non-resonated section)

NGK BKR7EIX Iridium Spark Plugs - Ideal for 2.0 TFSI s18x The M135i is shipped fromUpgrade your ignition performance with the legendary NGK BKR7EIX Iridium Spark Plugs. Trusted by performance enthusiasts and used in house on our own tuned customer vehicles, these plugs are a direct replacement upgrade for VAG 2. 0T EA113, EA888 Gen 1 and 1. 8T 20V engines. Designed for improved ignition efficiency, smoother power delivery and long term reliability, the BKR7EIX is the ideal spark plug choice for everything from standard factory