How to remove and install a Cobra Mustang IRS (independent rear suspension); 1999, 2000, 2001, 2002, 2003, and 2004 Cobras had an IRS that is a popular upgrade for all 1979-2004 Mustangs. This video shows how to remove and install an IRS when upgrading to a Kenny Brown IRS suspension rear grip kit. We drop the IRS, upgrade it to a Kenny Brown geometry cradle, lower control arms, upper control arms, toe links, and differential mount kit. Step by step.