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Old 02-21-2018, 11:36 AM
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The turbocharger is usually the biggest restriction in the exhaust system - for all non-DPF equipped trucks.

If I remember correctly, there was a proven power loss when a 5" exhaust system was installed in the middle-2000s Dodge Cummins trucks. To my knowledge, I don't know of a similar 5"/GM non-DPF connection.
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