Hellz yeah. They have those speakers all over ebay. I almost got one but I bought two JDM carbon fyber wings instead, one for the front, one for the back.
If he doesnt really care about performance, tell him to just get the BOV that sounds the best to him. And again, no matter what BOV he gets, the car wont run right unless he recirculates the vented air back into the system, which would get rid of the cool sound, and now he's at square -1 (no sound, and minus a couple hundred bucks).
And to reiterate:
1: The AFM measures the amount of air going into the engine.
2: The ECU says, through a speaker into the AFM's microphone, "Oh, hey! Thats alot of air! I''ll put in a bunch of fuel to go with it! Thanks for that info!"
3: The afm replies, "Yup! I'll keep measuring air, and you keep adding the fuel, and we'll be a great team!
4: The ECU replies back, "I love you, man. You're my best friend ever. Always so true to me."
5: You, the driver lets off the gas a little bit.
6: The BOV cover's the AFM's speaker with his hand and yells to the audience with a loud hiss, "HAHAHA! I have secretly let out a bunch of the air that the AFM told the ECU was coming, but the ECU doesn't know it yet!
7: The ECU looks up, after dumping all that fuel that the AFM told him he would need, and says "Hey, AFM, you lied to me! Why did you tell me all that air was comnig when it wasnt?"
8: The AFM says, "It was that new guy, the BOV, he sabotaged us!"
9: The ECU replies, "Well hold on! All that extra fuel wil cause the engine to almost die, and make the car buck really bad!"
10: The car bucks, and the engine almost dies and you, the driver, get confused and mad.
11: The ECU and AFM hear your shouts and then cry together, while the BOV waits silently, to pounce once more on the perfect system that one was the AFM, stock BPV, and stock ECU.
The end.
