I have a used 1 week JL StealthBox for 2006-Up BMW 3 series. It is fantastic. But my amps were overheating when installed where the factory amp was in my 2008 M3. Thus I had to go with a combination sub box and electronics cabinet in the place of the stealth box. Real bummer but my loss is your gain. I paid $1399 and will let go for $995 plus shipping. I have to have professionally packed since box was thrown out so that will be my cost to. However Local pick up in Raleigh NC would rock
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