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and high boost are our specialty
ignition timing advance
and best practices
With a Severn Tuning calibration
BMW Z4M / MSS70 Tune Upgrade New Tune:Custom MAF-Based and high boost are ourThis product is for a BMW Z4M MSS70 tune upgrade plus new tune. Tune upgrades are only available to existing Severn Tuning customers who have purchased an ECU tune. Tunes are VIN locked to the same vehicle for which the original tune was purchased. Additional tunes can be developed for alternative fuels (91 93 octane, race gas, flex fuel, E85, etc.), emissions compatibility, race off road use, dry wet throttle response, hardware changes, or many other
