Here is a general summary of chassis manufacturers recommendations for installing truck bodies and equipment on chassis equipped withengines and exhaust systems designed to comply with the 2007 emissions regulations:
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Do not modify exhausts ahead of the particulate trap.
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Modifications to the exhaust downstream from theparticulate trap are notrecommended. If necessary, modifications can be made only if exhaust pressures can be maintained.
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Avoid running wires near the exhaust system. Use the other frame rail whenever possible.
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When in doubt, contact the chassis manufacturer.