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99 and 2000 hp ratings for the 5.3


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Is there a real difference between the 2 as advertised? Or did GM holdback and underrate the hp of the 99's. The only difference I see is a different duct tube between the air cleaner to the airflow sensor.Maybe this straightens the air  some for a little more ooph on the high end.Also changes the intake noise.I would believe they underrated so as not to have such a big hp difference between the 98's to 99's.Maybe the inline six is good for an aspirated 300 hp, who knows.

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