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slowmover · 02-12-2012, 08:24 PM

Some, if not all, pickup truck cabs exhaust stale air out of the cab back. I'd always want some good negative pressure "pulling" at that area; it would be part of my experimentation to determine this.

02-12-2012, 08:24 PM	#3 (permalink)
slowmover Banned Join Date: Oct 2009 Location: Fort Worth, Texas Posts: 2,442 2004 CTD - '04 DODGE RAM 2500 SLT Team Cummins 90 day: 19.36 mpg (US) Thanks: 1,422 Thanked 737 Times in 557 Posts	Some, if not all, pickup truck cabs exhaust stale air out of the cab back. I'd always want some good negative pressure "pulling" at that area; it would be part of my experimentation to determine this.