THere is a BoV. I believe they call it By-pass Valve as it is recirculating unlive the BoV 100% vent to atmosphere.Usually just a more open airbox/intake setup helps with that too. I kept the stock BOV on my evo x. Just changing the intake and ditching the factory air box to a cone filter made it much louder. I haven’t even looked to see if there is a bov on the EC.
My first car was a 1962 VW Beetle with a 40 h.p. 1200cc air-cooled 4 cyl. engine. of the course of a couple years I put a modified intake manifold with a 2-barrel Holley carb, magnesium rocker arms and valve covers, tuned exhaust headers and a glass pack muffler, among other body modifications. Why? because it was fun and I thought it was cool (or whatever we called it back then ... hot, rad, tough, sick, groovy ). I doubt it helped much with performance or power, but it was a huge cosmetic improvement and it sounded ... um ... louder.whyyyy??? 😂