HKS Drop-In intake filter went bad
This is a result of using the HKS hybrid filter for about 3 years,
If you use them, and espeicially if you live in the hot region like I do, make sure you check them frequently.
The rotting side is the side near to the throattle body, which mean the engine will suck all these small sponge pieces into the combustion chambor directly unfiltered.
I'm not sure if this is documented already, just want you guys to know as this can cause a big problem!
Best
Gem
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