Is this the woofer in a full range loudspeaker or a subwoofer driver?
If its a woofer from a full range, I would not use a car sub. Most of them are 4 Ohm and inefficient to drive. I also find them to sound worse then Home audio drivers of the same price.
If you can get the stock driver use it. Its going to work with the box and crossover unlike another random driver.
SheepStar