Subaru Ascent Tuning
2 supported Subaru Ascent applications, 2018+.
Subaru
2 supported Ascent tunes
Subaru Ascent
2.4T
260 HP stock / 277 lb-ft
2018+
- Controller
- Engine (ECU): Hitachi SH72543
AutoTunerBook a tune
Subaru Ascent
2.4T
260 HP stock / 277 lb-ft
2018+
- Controller
- Engine (ECU): Hitachi SH72544
AutoTunerBook a tune
All Supported Subaru Ascent Tunes
| Engine | Years | Version | Stock power | Controller | Platform |
|---|---|---|---|---|---|
| 2.4T | 2018+ | 260 hp | ECU Hitachi SH72543 | AutoTuner | |
| 2.4T | 2018+ | 260 hp | ECU Hitachi SH72544 | AutoTuner |
Other Subaru Models
About Subaru Ascent tuning
Rapid Racing supports 2 Subaru Ascent applications from 2018+ through AutoTuner, with stock outputs up to 260 hp. Every calibration is built for your exact engine, fuel, and modifications, then verified on our Dynojet 424xLC2 in Jenison, MI, serving Grand Rapids and West Michigan.
Supported engines: 2.4T.
Supported controllers: Hitachi SH72543, Hitachi SH72544.
Don't See Your Vehicle?
These lists cover off-the-shelf tuning platforms. We also do standalone ECU installs and custom calibrations, so reach out and we'll tell you what's possible for your build. Compatibility data last updated 2026-09-24.