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Old 10-17-2002, 09:34 PM
Senior Member
Join Date: Sep 2002
Location: New Jersey, U.S.A.
Posts: 2,461
The black box you're referring to is called the resonance flap. It effectively lengthens the intake runners for optimal performance. Explaining it would take forever and I type real slow! To put it simply, they do wear out and make noise but it's no big deal. You're not going to blow up your motor or anything. I dont know what they cost but it's easy to replace, just four allen screws down thru the top and one electrical connector that can be unplugged after lifting the unit straight up a few inches. Good luck
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