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Old 08-19-2009, 09:28 AM   #4 (permalink)
Deezler
Master EcoModder
 
Join Date: Apr 2008
Location: Michigan
Posts: 261

Bio Deezler (sold) - '03 Volkswagen Jetta GLS TDI
90 day: 50.78 mpg (US)

The Beast. - '03 GMC Sierra 2500HD SLT
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Warmer intake air temp? No, that isnt helpful for a diesel. So I would leave a pathway for your air intake, maybe a tube protruding through the rest of your grill block?

Otherwise your top grill looks good to cover. Along the same lines, you don't want to cover your intercooler (much). I think your car is a good candidate for some duct work at the same time as the grill block. Feed the air directly to and ONLy to the areas where you need it.

Pulling the entire A/C system would likely help you out quite a bit.
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