Fuel Tuner for the 2021 Softail Slim
2 verified-fit parts, each checked against the 2021 Softail Slim specifically. Lowest price first.
- Daytona Twin TecM8FI G9 Race ECU - HD M8 Softail (2021-2025)⚠ Race/closed-course productFrom $1,071.75
- Zippers PerformanceThunderMax with AutoTune for 2021+ Softail⚠ Race/closed-course product$1,088.95
Build my 2021 Softail Slim →
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