I have 03 Durango 4x4, 3.92 gears with tow package. I bought this from dealer 2 months ago and ac sucked. They replaced evap motor, h valve and condenser and works much better but when it is 115 here in the desert still would like it colder. From past posts I see I should wrap the ac line from compressor to firewall, what about wraping ac line from that splits from firewall and runs length of car underneath to the rear wheel well for rear ac, should I wrap that also? Will it help the rear ac be a tad colder? I have also Installed Gibson exhaust and the airaid intake system. Is this a good combination? Sounds loud under the hood like mass air being sucked, does the cpu adjust itself for these changes? I notice when i come to a stop idle takes a couple seconds longer to level out at the 700 rpm mark now. Still ok I hope? Any advice would be great, Thanks.

 

You're fine with those mods, as long as you make the D breathe better it will respond nicely. May I suggest a fm40.

As for wrapping the lines that go to the rear ac, it couldn't hurt and I'm sure it will help a bit.