Multicar Tuning
Every Multicar model, engine, and controller we can tune, 2019+.
Multicar
1 supported vehicle via AutoTuner
Select Your Multicar Model
Multicar ECUs and TCUs
Multicar tuning at Rapid Racing
We support 1 Multicar vehicle across 1 model, covering model years 2019+, through AutoTuner. That includes diesel powertrains and 3 engine and transmission controllers.
Each Multicar tune is calibrated for your exact hardware and fuel, then verified with real data on our Dynojet 424xLC2 in Jenison, MI, serving Grand Rapids and West Michigan. Not sure which controller you have? Browse all supported ECUs or ask us.
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.