Denso Iridium Power using a 0.4mm diameter iridium alloy center electrode and a special ground electrode, IRIDIUM POWER realizes spark performance unseen until now. It steadily gives a high level of response under a variety of driving conditions. The result? Increased acceleration and torque compared to regular plugs.

Features and Benefits:
Improved Output - More power with an optimal combustion cycle
Improved Power - Increased output under various driving conditions
Improved Acceleration - Increased response and acceleration performance

https://www.denso.com/global/en/products-and-services/automotive-service-parts-and-accessories/plug/iridiumpower/

Fitment:
Perodua
Myvi 1.3 08-10'
Myvi Lagi Best 11-17'

Suzuki
Swift 1.4 ZC82 13-18'