10" subs

I came to a conclusion that i need to install a sub in my car(Ford Cougar 1999 or in USA Mercury Cougar) as of right now i have an aftermarket head unit and speakers. The head unit is Kenwood kmm-bt205 and the speakers are 4 Hertz speakers and 2 tweeters (I don't know any details about them...

1. Product: (2) BNIB Skar VD 10s 2. Specs: SKAR Audio VD-10D4 10" Dual 4 Ohm Car Subwoofer 3. Description/Condition: Brand new in box 4. Price: : $185 shipped 5. Pictures: (List pictures in this section, 1st picture should be your username/date if you have less than 10...