No, I mean fluid friction inside the pipe. A flexible suction line will need to have a larger diameter than the original aluminium suction line to maintain the same pressure drop.
Because it's temperature control relies on using the heater core to moderate the return air temperature. If you only ever want it "bloody cold" then you probably don't need to worry, but if you ever want it "not quite so cold" then you need the coolant lines to the rear as the control module will expect to be able to use the heat. Same reason the ATC in the front won't crank up properly unless the coolant is > ~40C and wants >60C before it'll try and moderate the return air temp.
It sets the evap at just above freezing to drop out the humidity and then re-heats from there.
Hi I'm Brad, I have a 2008 6 speed Manual XS (UK Import). So it has EAS, Nav, RSE, Leather, HK Stereo (not the Logic 7), 7 seats, heated front seats, FBH and no rear A/C.
It also came from the factory with DPF. It's "different".



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