These kits are easy to install by any knowledgeable technician. <br/> Some in as little as 15-20 minutes. <br/> They do not require the use of your existing OEM nuts (M20 x 1.5 & M22 x 1.5) as they are supplied in this kit.<br/> They allow for front air conditioning operation without the loss of refrigerant from the rear lines or evaporator. <br/> Also makes it unnecessary to absorb the costly replacement of the rear air condition lines or evaporator (some estimates of repair approaching or exceeding $1500.00). <br/> The result is quality cold air especially in the mini vans. <br/> A quality engineered and manufactured kit complete with o rings or sealing washers, nuts and bolts when needed plus basic instructions.<br/><br/> Replacement for: '2004-2011 CHRYSLER TOWN & COUNTRY (some 2004's may use the 2003 kit and some 2011's may not work refer to photo's)<br/> 2004-2011 DODGE CARAVAN (some 2004's may use the 2003 kits and some 2011's may not work refer to photo's)