Apr 13, 2012 #1 H hpengineprep Well-Known Member Messages 38 Reaction score 17 Location Boulder Creek, Ca. Vehicle Model Civic Si Body Style Sedan Does anyone know if the 2012 Civic Si has a hydrocarbon adsorber in the intake? Just wondering if it does, power/sound may be improved.
Does anyone know if the 2012 Civic Si has a hydrocarbon adsorber in the intake? Just wondering if it does, power/sound may be improved.
