I was seriously considering this. The JL 8w3 is rated to work down to 35w and supposedly the stock JBL amp puts out 55w to the stock JBL sub. I would only imagine that the JL Audio sub is a fare bit more efficient than the JBL one. I think it could be a good swap for a bit more hit.I was wondering if the JL 8W3v3 sub would fit in the factory JBL crewmax box and then put a bigger amp on it. Anyone tried this or have n opinion?