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Looks normal to me. Many intakes on modern engines get soot like this due to the EGR systems. I'd recommend replacing the PCV when installing it and using some intake and carb cleaner to clean it up.
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2013 BRZ Premium 6MT - Track Car, 2020 GMC Canyon Denali Duramax - Tow Vehicle, 2021 Forester Sport - Wife's Daily, 2016 Crosstrek - Daughter's Ride and always buying random flips...
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