That's why I'll use an underhood temp gauge to choose a grille setting. If I keep the underhood temps at a good place the intercooler won't be too warm to do the job when needed. It is out in front of the radiator, which will still need some flow. Just not the huge bucketfuls of air it enjoys now at freeway speeds
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2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle
currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears