improve fuel efficiency

leading to steel clutch plates digging in and causing hang-ups or slow application and release times

440-zone ignition table with multiple ignition maps

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Lightweight H-beam design – reduces rotating mass and improves throttle response

Kies Motorsports Charge Pipe, BMW S58 525ix improve fuel efficiencyThe charge pipe and boost pipe are the pipes that hold pressurized air from your turbo and take it to your engine. Unfortunately, BMW typically makes OEM charge pipes out of plastic or rubber, which is a terrible idea for holding pressurized air. While this is a very cost effective thing for a manufacturer to do, they typically fail when the plastic starts to age, especially when you start to turn up the boost in your car. If you have a charge pipe