This pack of 8 APR Iridium Pro spark plugs is a great choice for tuned 4.0 TFSI engines, such as those in the Audi RS6 C7 and Audi RS7 C7. Made with Iridium for maximum durability under high temperatures and pressures, these grade 9 spark plugs deliver a stronger spark and improved heat dissipation, no matter the fuel type.
Key features:
Heat range 9 spark plug (Similar: Bosch 3, Brisk 10, Denso 27, and NGK 9)
152% higher melting point than silver, 125% higher than copper, and 38% higher than platinum.
Stronger than copper and platinum
Designed for high performance / tuned vehicle applications
Non-projected insulator design
Lower required supplied voltage
Cooler operating temperature than stock plugs
Optimized electrode design for hard to ignite fuels, such as ethanol
