A popular request by people with the MM2100 kit. This tune is intended specifically for the Metric Mechanic (MetricMechanic; MM) 2.1L rally engine for the M42B18. If you are not running an MM2100 kit, please see the following page: M42B18 TUNE
This chip is compatible with:
- M42B18 base engine with full 2.1L MetricMechanic (MM2.1, MM2100) build.