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Old 09-15-2012, 01:28 AM   #2 (permalink)
bikin' Ed
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Join Date: Jul 2008
Location: Tallmadge, OH
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rad blocks

Radiator blocks serve two or three purposes. 1) They keep cool air from entering the engine bay leading to quicker warm up. 2) The air kept out of the engine bay generally gives an aero advantage. 3) After the engine is warm, it keeps more warm air available for the engine intake--usually leading to an increase in mpg.
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