elkmeat, your best bet is the
Thule 400XT Aero Complete Roof Rack Base System. This is designed to fit your 2007 Malibu MAXX perfectly and is very quick to install (easy-to-follow instructions included). No matter what gear carriers you plan to carry on your roof, you will need a multi-purpose roof rack base system. The Thule 400XT Aero system includes four 400XT Aero feet, four FitKit 2156 Clips (specific to your vehicle) and two load bars (please note the 58" load bars are the recommended length for carrying two kayaks at the same time). You will attach the kayak carriers to the front and rear load bars. This system easily mounts to the specified points on your rooftop where the roof and top of the door wells meet (the instructions show you exactly how to do this. No drilling or anything necessary).
You can then mount any of
Thule Racks kayak racks to the 400XT load bars. You should really consider the Thule 878XT Set-to-Go/ 877XT Rollercoaster combo set. The 878XT Set-to-Go/ 877XT Rollercoaster combo set works with all types of kayaks and uses one pair of 878XT's on the front load bar of the 400XT and a pair of 877XT's on the rear load bar of the 400XT. This combination provides the easiest most hassle free loading and unloading system available. Includes all hardware, 2 straps, buckle bumpers and a pair of Thule 855 Quickdraw ratcheting tie down straps for securing boat bow and stern. Just make sure you get two of each for carrying two kayaks.