I am currently deciding between the Maximum Motorsports kit and the Full Tilt Boogie Racing kit (FT 5000).
https://www.maximummotorsports.com/IRS-Rear-Grip-Package-Street-1999-04-Cobra-P1345.aspx
http://fulltiltboogieracing.com/1999-2004_Cobra_Suspension_Parts_and_Tools.htm
The MM kit is a...