My winter front I made for my grill
Yeah its still breaths through the holes in the bumper.I drove it today and it did just fine if you google image dodge cummins winter front you can see a bunch of different ones people have put on there trucks.
It's not gonna warm up at idle in cold weather all thats gonna do is wash down the cylinder walls with diesel. Thats why you need a high idle (aka stick) for cold weather


