Denso Iridium Power Plug One Step Colder IKH22 - Subaru EJ25 Turbo Models (inc. 2004+ STI / 2006-2014 WRX)
Manufacturer Part # 5345-IKH22
Once you start performing modifications that increase horsepower and torque such as a turbo-back exhaust system, intake, injectors, and a tune, going to a colder spark plug is required.
Here, you are looking at the Denso IKH22 (5345) Iridium Power Spark Plug. These are a 1-step colder spark plug, and it has been designed to provide durability under the most extreme of conditions, and the featured patented iridium alloy is six times harder and eight times stronger than conventional platinum, and can handle temperatures in excess of 4000°F.
Note that these are sold individually.
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PEOPLE WHO VIEWED THIS ITEM ALSO VIEWED
Good product no problems...
2013slowsti 4 years ago
Good problems no need to blame on the product because it is a pain to install the plugs on Subaru vehicles. These are great replacement for stock plugs that cant handle all the power adder mods.
smader1210 5 years ago
Plugs simply didn't give enough fire to start my car. I was very disappointed. Switched to stick NGK plugs and started right up. Was a huge hassle because STi engines are a pain in the ass to change the plugs on.
Aloha#17 5 years ago
Big difference on the response, especially when paired with my okada plasma direct coils, a must have for your sti or wrx and you can get the coils from RSD. RSD once again the BEST!!!
a different car
Subiesuperlover 5 years ago
Must change, feel the difference, no more shaking.
QUESTIONS & ANSWERS
Q: Plug Heat Range Ozpic 4 years agoAnswer
Why one step colder ? this is an issue that has always confused me as people I have spoken to seem to have a different take on the subject,so if some one can clear this up without getting to technical I sure would appreciate it.
A: The idea is to go one step colder per 75-100HP you add. This helps prevent predetonation and knock.
guest56ad69792a8d256e198b66b5 4 years ago