Retuned a car today that we had done a dyno tune on a few months ago. Car has Dinan Intake and throttle bodys and catback. The below graph shows pre/post tune on the car.
After adding the CPI headers and returning to the dyno this is the difference with no tuning changes. Notice the significant low end loss.
These are the changes from tuning after adding headers
And finally the progression from beginning to end. Stock, Tuned, then Tuned with headers.
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