If you look at my build thread, you will see I used all Genuine GM parts and rebuilt the entire front and rear suspension and used the Hellwig adjustable sway bar kits, front and rear. My Z71 will corner and handle like a dream now and I feel like I am flat tracking thru curves at typically 15-20 mph over the recommended curve speed. That rig sticks like glue now. If you use aftermarket parts and try to buy for price alone, you will have new parts but will not be satisfied though. I do make exceptions for MOOG and DELPHI parts though.