I had my car tuned at Uprev in Austin TX. The top end gain was 4hp from 282 baseline to 286. In the middle of the power band, I picked up 10hp. To be honest, I was super disappointed with the results as I was expecting an improvement of up to 20hp.
The tuner told me that about 5hp on the top end was normal for the AT and that a 20hp gain was impossible for these cars.
In my experience, the tune was not worth the expense. I needed it to clear the codes created by my 4.08 gear upgrade.
If you have added standard upgrades like intake, TP and exhaust, you don't need a tune. The ECU will adjust properly to accommodate the improved air flow.
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Top Speed CF Intake, FI Non Res TP, Nismo Exhaust, ONEighty LED, JDM Rear Fog, Kranze II, Michelin Pilot SS, Quaife LSD, 4.08, Whiteline, UpRev
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