Most factory sound systems can't give you the dramatic and high quality bass range that comes from having a subwoofer. Achieving the bass tone you want depends on power, space, enclosure, sensitivity, impedance, and number of voice coils. You can pair your subwoofer with an amp or purchase a subwoofer with an amp built in so that it's already powered. The bass from your subs will create the sound and feel of a live show happening in your car.
MESA 5703M 2-Way Remote Start
Viper 4806V 2-Way Remote Start System
Viper 4105V 1-Way Remote Start System
Escort Passport 9500ix
Rockford Fosgate Punch 2 Kit (Harley Davidson)
Rockford Fosgate RZR-Stage2