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HKS Billet Oil Filler Cap
it is threaded almost all the way to the top of the knob to allow those to adjust for a shorter or taller shift knob to your liking
Excessive oil-saturated air circulating back into the air intake stream can lead to degraded performance
unfinished engine bay appearance
turbo compressor side routing
AOS Kit- GV/GR Subaru STI Red 2008-2014 Subaru WRX / STI Subaru-WRX-2023 HKS Billet Oil Filler CapRallySport Direct proudly carries a great selection of quality aftermarket products that have been expertly engineered and crafted by Verus Engineering. This is the Verus Engineering Air Oil Separator. This AOS has been designed to ensure that your intake system remains oil free of dangerous oil vapors and residue that can certainly have an effect on your performance. Oil in the intake system can reduce the octane which can lead to detonation,
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