BMW Z4M (2006-2008) MSS70 ECU Tune - OTSSee our full write up for more details and other tuning options! Off the Shelf (OTS) Standard Tune: This is our OEM plus tune, ideal for stock or near stock naturally aspirated engines. Expect approximately +15 max horsepower gains on a completely stock car, and more with additional modifications such as catless headers. This tune can be optimized to support basic bolt ons such as aftermarket intakes, catless headers, and free flow exhaust systems.
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