Quote:
Originally Posted by ROBERT1183
i was running the ark grip 2.5'' exhaust on my car. Car made 501whp at 10psi. Aam installed a custom 3'' system on the car and the car made 580whp on that old tune. Nothing else on the car was changed. Same dyno. Similar conditions.
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Did the tuner go less aggressive? You said you made 580 after the 3inch exhaust upgrade. But your signature says 540