Hot or Cold Side: Used on diesel engines to deliver pressurized intake air to the charge air intercooler and intake manifold. Duraguard: Used on diesel engines to deliver pressurized intake air to the charge air intercooler and intake manifold. Fluorocarbon lining eliminates closed crankcase vapors from permeating through the sidewall of the intercooler connection bellows at 500°F (260°C)
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