If the subs are good/meaning coils read GOOD/Properly and the box is tuned for the subs I would jump on that asking price for all.One hell of a deal.In the correct enclosure those subs will sound amazing compaired to the Kickers that you have,and are better quality,and will handle Alot more power than the kickers you have.Will they sound better than your current set up???Who can say without knowing your complete setup,Electrical cu ft and Htz/tuned enclosure(prefab or custom)and thickness ect. Any sub woofer performs and sounds as good as its enclosure as well as application. Ive heard a pair of Lanzar Max Pro 12s sound better than a pair of Sundown 12s that were on more power at a show last year.Its all about install and detail to specs that gain.Yet, for $150 bucks??If the coils read fine on a DMM and coils look clean,and no punctures in the surrounds? Id snagg them right up and build a box for them and put them in that suv.And decide for yourself