Two Step Performance

TSP Stage 1 Tune for 2017+ Honda Civic Si

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  • $79.99
  • Regular price $99.99

Customer Reviews

Based on 10 reviews
Must have if you get a ktuner/hondata.

After reading many threads on civicx and debating whether if I should tune I finally bought it and got a ktuner v2 and bought the stage 1 tune. This wakes up the car so much and makes it feel so much faster. My only regret was not flashing sooner! The different maps make it super convenient as well, whenever I'm stuck in traffic I can stay in map 1 and once I want to rip it I'll switch to map 3 for full performance. I have not seen a hit on my MPG as well, maybe a little less since I'm flooring it more. If you're concerned on reliability civicx has a great thread for people who tuned, people have reached 50k+ miles tuned with no issues.


I was a bit worried at first since I didn’t want to “damage” my car but i pulled the trigger and said I need a lil bit more power! And after having the tune for almost a year, I can say i still love it !

Night/Day Difference

I went from having the Hondata +6 psi tune to KTuner 19/23 basemap to the TSP Stage 1. By far the best tune you can purchase for the 10th gen Si. Really wakes up the car. Also note that my car is stock besides a RMM. Highly Recommend this tune. You won’t regret it!

TSP Stage 1

This tune is absolutely amazing! I switched from the ktuner 19/23 and it's a very noticeable difference. TSP customer service is fantastic and I am very happy with everything so far. Thank you :)


Awesome tune guys Great customer service. Looking forward for a custom tune when i get intercooler charpipes , and a bigger turbo

*New tune orders are fulfilled via email every couple of hours throughout the business day. FlashPro tune orders may be slightly delayed due to the process required to build your custom file.*

Click here for our installation guide.

Two Step Performance has partnered with Derek Robinson to offer a high quality Stage 1 tune for the 2017 Civic Si that offers an additional 55 whp and 76 ft lbs of torque in comparison to the factory ECU calibration. Details are as follows:

182whp / 206tq - Factory Calibration
208whp / 258tq - KTuner Starter 23psi
237whp / 281tq - TSP Stage 1 Tune

All testing was completed on a stock 2017 Civic Si running 93 octane fuel. Tune features include:

  • Numerous fuel, ignition, turbo response, throttle response changes.
  • WOT shifting enabled.
  • Adjustable launch control enabled.
  • "Rev hang" disabled with standard throttle padding. (the end user can enable "rev hang", if desired)
  • All disables / monitors are able to be adjusted by the end user.
  • Quick Boost By Gear is able to be adjusted by the end user.
  • On-the-fly boost map switching active for normal and "Sport" modes. (see below)

Map 1: Factory boost levels and turbocharger response.
Map 2: 19psi normal, 21psi "Sport" mode, Improved Turbocharger Response II
Map 3: 19psi normal, custom boost level "Sport" mode, Improved Turbocharger Response II

Factory boost level in "Map 1" allows for easy "valet" mode when the KTuner unit is unplugged from the car!

Premium fuel (91 or 93 octane) is REQUIRED.

Suitable for use with the factory intake or a QUALITY aftermarket intake that keep fuel trims in check such as the PRL Motorsports Cobra. Aftermarket downpipes are also fine. Mods such as this are expected to add power that is not accounted for in our dyno testing.

Please verify that your ECU is supported via our TSP Tune Compatibility List prior to purchase.

This tune is for the 2017+ Civic Si only. Please be sure you are purchasing the correct tune for your vehicle because digitally delivered items are non-refundable. (If you buy this for your 2016 Civic LX, it won't work, and we cannot offer a refund.)