Tapout Tuning

LF4 Performance Tuning Specialists

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2023 CT4-V Blackwing A10 Purple Belt!

Vince dropped by with his 2023 CT4-V Blackwing for the Purple Belt treatment. Since his car had the A10 transmission, we worked with HP Tuners to unlock and tune both the ECM and TCM. We provided Vince with two custom tunes. The first is his ‘daily’ tune, which constantly reads alcohol content and automatically scales fueling and ignition timing, producing 516 whp on 93-octane pump gas and 571 whp on E60 or higher. The second is his ‘kill tune’, which has boost and timing both cranked up. This tune produces a peak of 614 whp.


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What are the goals for your car?

If you’re like us, you have a hard time keeping your car stock for long. You might start off by thinking, “Ok, I’m definitely not going to mod this one”, but we all know how that goes…

That being said, what are the next goals you have for your car? Let us know on Facebook or Instagram

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December Downpipes, Springs and Dampers Sale!

Now through December 27th, save big on ATS-V and CTS-V Sport downpipes as well as Swift lowering springs and ATI Super Dampers.  At these prices, they go quick so be sure to get your order in before they are gone!

            • ATI Super Dampers (for LF4 and LF3 engines), $777!
            • Swift lowering springs (for all CT4/5 variants), $444!
            • Tapout downpipes (for ATS-Vs and CTS-V Sports), starting at 649

Visit the Sales Page for more details!

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CTS-V Sport Brown Belt Package! – Don Carter

Don brought his 2019 V Sport up from Louisiana for the full Brown Belt treatment. The powerband is excellent as usual. However, we were limited to fifth gear dyno pulls since V Sport TCM tuning access isn’t available.  This produces a little less boost and lower measure horsepower on the chassis dyno. We also couldn’t pull past 6,500 rpm for the same reason.

After completing the dyno, however, we took it out on the street and confirmed things still looked great in real world conditions.  The results were fantastic and his car produced 30 pound of boost!  While the dyno results showed 661 WHP with SAE correction factor, on the street his car is producing much closer to 700 WHP!