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They are in exhaust direction--time will tell later if they draw most of the air from thru the lower grille and out the upper--the possibility exists that part of the air will be drawn in from the top opening of the grille they are mounted behind. T think they will work ok as any movement will help draw air upward.
The original ones were mounted about a foot below the upper grill in a horizontal plane, and all the air movement HAD to come from the lower grill.
Joe
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2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired
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