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Preloaded apps
ECU+ Upgrade | Up to 669HP / 734TQ | Gains: +106 HP / +140TQ
RENNtech Air Intakes The air intake system is a critical component in optimizing engine efficiency and performance
45 mph *If not otherwise noted
RENNtech ECU Upgrade Z4 35iS E89 (2008-2012 N54B30to) jaguar-xj--351---2009-2019--esr9874497 Preloaded appsRENNtech ECU Upgrade Z4 35iS E89 (2008 2012 N54B30to). Up to 420 HP + 435 TQ. Gains: +100 HP & +103 LB FT Our proprietary BMW ECU upgrade offers rock solid performance from RENNtech, the foremost tuning authority on Bosch and Siemens engine control units. These same units are utilized in Mercedes Benz vehicles, which RENNtech has been tuning since electronic engine management started to show up in vehicles during the mid 1980's, though our proprietary
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