Not really that important. For the most part, if you leave the original LH battery box intact, then you'll get as much cool air as you need. While you're cruising down the road, the difference in air temperature between shielded and non-shielded is minimal. When you think about our trucks which are intercooled, it makes even less difference in actual intake air temperature just before the air is routed into the cylinder heads.
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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