The cat is restricting airflow. Under no load in park, it takes very little air to rev it that high. Once you put it in gear (under load) a lot more air is required to rev it that high.
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The cat is restricting airflow. Under no load in park, it takes very little air to rev it that high. Once you put it in gear (under load) a lot more air is required to rev it that high.
Last edited by GTPpower; 03-14-2017 at 04:26 PM.
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