Cooling is improved with additional air ducts. However, if you are not running turbo's, it may just be overkill. Although Stillen manufactures some decent CAI, CBE's, etc, their body components/kits have had quality and fitment issues. I say stay away from the air ducts. If I were you, I would consider a good cold air intake, either Stillen or Z1, plus a good cat. back exhaust, such as FI. Good luck.
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